Vzhledem k tomu, že je částka chybná, reklamuji vyúčtování.

Vzhledem k tomu, že means since, given that, or considering that.

It is a fairly formal phrase, especially common in:

• written complaints
• official emails
• administrative language
• formal explanations

Literally, it is something like with regard to the fact that.

In everyday speech, Czech speakers would often use simpler options such as:

• protože = because
• jelikož = since / because

So this sentence sounds more like a formal complaint or written statement than casual conversation.

Czech uses commas to separate a subordinate clause from the main clause.

Here the structure is:

• Vzhledem k tomu, že je částka chybná = subordinate clause
• reklamuji vyúčtování = main clause

So the commas work like this:

• before že because že introduces the subordinate clause
• after chybná because the subordinate clause ends there and the main clause begins

This is standard Czech punctuation.

Because částka is:

• feminine
• singular
• nominative

The adjective has to agree with the noun, so:

• chybný = masculine singular
• chybná = feminine singular
• chybné = neuter singular / plural in some contexts

Since částka is feminine, the correct form is chybná.

Also, after je in this kind of sentence, Czech uses an adjective in the form that agrees with the subject:

• částka je chybná = the amount is incorrect

In a normal full sentence, Czech usually needs the verb být (to be) in the present tense:

• částka je chybná = the amount is incorrect

Leaving out je would sound incomplete here.

Czech can omit forms of to be in some special styles, such as:

• headlines
• notes
• very informal shorthand

But in a proper sentence like this one, je is required.

Yes, this is a very common point of confusion.

The root reklam- appears in words connected with both:

• advertising
  and
• complaints/claims

In this sentence, reklamuji comes from the customer-service meaning of reklamovat, which means:

• to make a complaint about
• to claim
• to dispute
• to return as faulty / challenge as incorrect, depending on context

So here:

• reklamuji vyúčtování = I am disputing the bill/statement

This is especially common in contexts like:

• faulty products
• invoices
• billing errors
• warranty claims

Here vyúčtování is the direct object of reklamuji, so it is in the accusative.

However, vyúčtování is a neuter noun of a type where the nominative singular and accusative singular are the same.

So:

• nominative: vyúčtování
• accusative: vyúčtování

That is why the form does not visibly change.

This is very common with many neuter nouns in Czech.

Vyúčtování is a somewhat formal word meaning something like:

• billing statement
• account statement
• settlement of charges
• final bill

The exact translation depends on context.

For example, it can refer to:

• utility billing
• service charges
• rent/energy settlement
• a formal financial statement of what is owed

So in this sentence, it is not just a casual bill in the everyday restaurant sense. It sounds more like an official statement of charges.

Yes, but the nuance changes.

• chybná = incorrect / erroneous
• nesprávná = incorrect / not correct
• špatná = bad / wrong, but more general

In a formal billing context, chybná sounds very natural because it suggests there is an error in the amount.

So:

• částka je chybná sounds precise and formal
• částka je nesprávná is also possible and very natural
• částka je špatná is understandable, but a bit less precise in this context

Reklamuji is:

• present tense
• 1st person singular
• from the imperfective verb reklamovat

So it literally means I am complaining / I complain / I am disputing.

In formal Czech, the present tense is often used performatively, meaning the speaker is performing the action by saying it. In other words:

• reklamuji vyúčtování = I hereby dispute the statement

That sounds very natural in a formal complaint letter or email.

Yes. The sentence would still be correct:

• Protože je částka chybná, reklamuji vyúčtování.

This means essentially the same thing.

The difference is mainly style:

• vzhledem k tomu, že = more formal, official, written
• protože = more neutral and everyday

So if you are writing a complaint email or official message, vzhledem k tomu, že fits very well.

Not completely. Czech word order is fairly flexible, but different orders sound more or less natural depending on emphasis.

The original order:

• Vzhledem k tomu, že je částka chybná, reklamuji vyúčtování.

puts the reason first, which is very natural in formal writing.

You could also say:

• Reklamuji vyúčtování, protože je částka chybná.

This is also correct, but the flow is slightly different:

• first the action
• then the explanation

In formal complaints, giving the reason first often sounds especially clear and appropriate.