Не надсилатиму претензію, якщо тільки служба підтримки не відмовиться замінити товар.

Ukrainian often leaves out subject pronouns when they are already clear from the verb ending.

Here, надсилатиму means I will be sending / I will send, so the I is built into the verb form. Because of that, я is unnecessary unless you want extra emphasis.

• Не надсилатиму претензію = I won’t send a complaint
• Я не надсилатиму претензію = I won’t send a complaint, with extra emphasis on I

Надсилатиму is the 1st person singular future form of the imperfective verb надсилати (to send).

So:

• надсилати = to send, to be sending
• надсилатиму = I will send / I will be sending

This is the simple future of an imperfective verb. In Ukrainian, imperfective verbs can form future in two ways, but this form is very common:

• я надсилатиму
• also possible: я буду надсилати

Both mean roughly I will be sending / I will send, though the imperfective often gives a more process-oriented or less one-time-completion feel than a perfective verb would.

Both are possible, but they use different aspects.

• надсилатиму = imperfective
• надішлю = perfective

A rough contrast:

• Не надсилатиму претензію = I won’t be sending / I won’t send a complaint
• Не надішлю претензію = I won’t send the complaint

The perfective надішлю focuses more on the single completed act of sending.
The imperfective надсилатиму can sound a bit less sharply focused on completion and more like a general decision or course of action.

In many real contexts, either could work, but the aspect choice changes the nuance slightly.

Претензія can mean a complaint, claim, or formal grievance, depending on context.

In customer-service language, it often means something more formal than just a casual complaint. It can suggest an official complaint or claim made to a company.

In this sentence:

• претензію is accusative singular
• dictionary form: претензія

So:

• претензія = complaint / claim
• надсилати претензію = to send/submit a complaint or claim

Because it is the direct object of надсилатиму.

The verb надсилати takes a direct object in the accusative case. Since претензія is a feminine noun ending in -я, its accusative singular becomes претензію.

• nominative: претензія
• accusative: претензію

So:

• Не надсилатиму претензію = I won’t send a complaint

No—here якщо тільки ... не works together as a set expression meaning unless.

So:

• якщо тільки служба підтримки не відмовиться...
  = unless customer support refuses...

This is not interpreted as a normal double negative. It is a standard Ukrainian structure.

A learner might try to read it literally as if only ... not, but in this kind of sentence it functions idiomatically as unless.

Not naturally in English.

Although якщо тільки can look like if only, in this sentence it does not mean the emotional English expression if only...! as in If only I had more time!

Here it is part of the conjunction:

• якщо тільки ... не = unless

So the sentence means:

• I won’t send a complaint unless customer support refuses to replace the item.

not

• If only customer support doesn’t refuse...

Відмовиться is the 3rd person singular future form of відмовитися, which means to refuse.

So:

• відмовитися = to refuse
• вона/служба відмовиться = she/it will refuse

The -ся is part of the verb. Many Ukrainian verbs are reflexive in form, and you simply learn them that way.

In this sentence:

• служба підтримки не відмовиться = customer support will not refuse

Even though служба is grammatically feminine, in English we translate it naturally as customer support.

After відмовитися (to refuse), Ukrainian often uses an infinitive to say what action is refused.

Here the infinitive is замінити, the perfective infinitive of to replace.

• замінити = to replace, to complete the replacement
• замінювати = to be replacing / to replace repeatedly or as a process

Because the idea is a single completed action—replacing the item—замінити is the natural choice.

So:

• відмовиться замінити товар = will refuse to replace the item

Товар is the direct object of замінити (to replace), so it is in the accusative case.

But because товар is an inanimate masculine noun, its accusative singular looks exactly like its nominative singular.

• nominative: товар
• accusative: товар

So the form does not change, even though the case is accusative.

This means support service or customer support.

It is a noun + noun structure:

• служба = service, department
• підтримки = of support

The second word is in the genitive case:

• dictionary form: підтримка
• genitive singular: підтримки

So literally it is service of support, which English expresses as support service or more naturally customer support.

It is singular.

The head noun is служба (service/department), which is singular and feminine, so the verb is also singular:

• служба підтримки не відмовиться

Even though in English we may think of customer support as a group of people, grammatically in Ukrainian it is a singular noun phrase here.

Yes, Ukrainian word order is fairly flexible.

The given version is natural:

• Не надсилатиму претензію, якщо тільки служба підтримки не відмовиться замінити товар.

But you could also move the conditional clause first:

• Якщо тільки служба підтримки не відмовиться замінити товар, не надсилатиму претензію.

That still means the same thing:
Unless customer support refuses to replace the item, I won’t send a complaint.

The choice of word order mainly affects emphasis and flow, not the core meaning.

Yes, it sounds fairly formal or at least semi-formal, especially because of words like:

• надсилатиму = will send
• претензію = complaint/claim
• служба підтримки = support service
• замінити товар = replace the item/product

This sounds like something you might say in a customer-service, consumer-rights, or business context rather than in very casual everyday speech.

A more conversational person might choose simpler wording depending on the situation, but this sentence is perfectly natural and correct.

The sentence has two parts:

1. Не надсилатиму претензію
   = main clause
   = I won’t send a complaint

2. якщо тільки служба підтримки не відмовиться замінити товар
   = conditional clause
   = unless customer support refuses to replace the item

So the whole structure is:

• [main statement] + [unless-clause]

In natural English:

• I won’t send a complaint unless customer support refuses to replace the item.

That means the speaker is saying they will not complain, except in that one case.