Я написала оператору, потому что статус заказа не менялся два дня.

Написала is the past tense feminine singular form of the verb написать.

Russian past tense agrees with the gender of the speaker if the subject is я in the past:

• я написал = I wrote / I wrote to... (male speaker)
• я написала = I wrote / I wrote to... (female speaker)

So this sentence tells you that the speaker is female.

Because the verb написать / писать when used in the sense of write to someone takes the dative case for the person receiving the message.

So:

• оператор = operator, support agent
• оператору = to the operator

Compare:

• Я написала оператору. = I wrote to the operator.
• Я позвонила оператору. = I called the operator.
• Я отправила оператору сообщение. = I sent the operator a message.

Here оператор usually means a customer service agent, support representative, or call center operator, not a machine operator.

In contexts involving an order status, оператору most likely means:

• a support agent
• a help desk person
• a customer service representative

So the sentence suggests the speaker contacted customer support.

It actually is статус заказа in the sentence.

The noun заказ changes to заказа because it is in the genitive case. This is a very common pattern in Russian: one noun modifies another, often like of in English.

So:

• статус = status
• заказ = order
• статус заказа = the status of the order / order status

This is similar to:

• номер телефона = phone number
• цвет машины = the car’s color
• начало фильма = the beginning of the film

Не менялся uses the imperfective verb and emphasizes that the status was not changing over a period of time.

• меняться = to change
• не менялся = was not changing / did not change

This fits well with два дня, because the idea is that for two days there was no update.

If you said не изменился, that would sound more like:

• did not change as a result
• no change occurred by a certain point

Both can be possible in some contexts, but не менялся два дня strongly highlights the ongoing lack of change during that period.

The ending -ся marks the verb as a reflexive/intransitive form.

Here:

• менять = to change something
• меняться = to change, to be changing

So:

• Я меняю статус. = I am changing the status. (changing something)
• Статус меняется. = The status is changing. (it changes itself / it is changing)

In your sentence, the status is the thing undergoing the change, so Russian uses меняться:

• статус заказа не менялся = the order status was not changing

Because два дня here means for two days, not two days ago.

• два дня = for two days / during two days
• два дня назад = two days ago

So:

• Статус заказа не менялся два дня. = The order status did not change for two days.
• Я написала оператору два дня назад. = I wrote to the operator two days ago.

These are different time expressions:

• duration: два дня
• point in the past: два дня назад

After many expressions of duration, Russian uses a form that looks like the accusative, but with time expressions after numbers it can resemble the genitive singular/plural pattern.

For 2, 3, 4, nouns usually take the form used after these numbers:

• два дня
• три часа
• четыре недели

So два дня is the normal way to say for two days.

Compare:

• один день = one day
• два дня = two days
• пять дней = five days

Because потому что introduces a subordinate clause meaning because.

Russian normally separates this kind of clause with a comma:

• Я написала оператору, потому что статус заказа не менялся два дня.

The structure is:

• main clause: Я написала оператору
• subordinate clause: потому что статус заказа не менялся два дня

This is very similar to English punctuation, although Russian is often even more consistent about using commas with subordinate clauses.

Yes. Russian word order is flexible, although the original sentence is the most neutral.

Original:

• Я написала оператору, потому что статус заказа не менялся два дня.

Possible variations:

• Потому что статус заказа не менялся два дня, я написала оператору.
• Оператору я написала, потому что статус заказа не менялся два дня.

These versions change the emphasis:

• starting with Потому что... foregrounds the reason
• starting with Оператору emphasizes who was contacted

But for a normal, neutral statement, the original word order is best.

Написала is perfective.

• писать = imperfective, to write / be writing
• написать = perfective, to write, to complete writing, to send a message

Here the speaker means a completed action: she contacted the operator. That is why написала is natural.

Compare:

• Я писала оператору. = I was writing to the operator / I used to write to the operator / I wrote (focus on process, repeated action, or background)
• Я написала оператору. = I wrote to the operator / I sent the operator a message (completed event)

Yes, absolutely. In modern Russian, написать кому-то often means:

• to message someone
• to text someone
• to email someone
• to write to someone online

So Я написала оператору could mean the speaker contacted the support agent through:

• chat
• email
• app messaging
• a website form

It does not have to mean a physical letter.

Yes. The sentence is already natural, but there are a few common alternatives depending on style.

Examples:

• Я написала в поддержку, потому что статус заказа не менялся два дня.
  = I wrote to support, because the order status hadn’t changed for two days.

• Я написала оператору, потому что два дня не было изменений в статусе заказа.
  = I wrote to the operator because there had been no changes in the order status for two days.

• Я написала оператору, потому что статус заказа не обновлялся два дня.
  = I wrote to the operator because the order status hadn’t been updated for two days.

That last version, with не обновлялся, is especially common if the idea is that the tracking or order page was not updating.