В силу того, что неоплаты парковки нет, штраф отменили.

Yes, it is quite formal. It means something like because, since, or due to the fact that.

This expression is common in:

• official writing
• legal language
• bureaucratic statements

In everyday spoken Russian, people would more often say:

• потому что
• так как
• поскольку

So в силу того, что gives the sentence a noticeably official, document-like tone.

The second comma, after нет, is the easier one: it separates the reason clause from the main clause.

• В силу того, что неоплаты парковки нет = subordinate clause giving the reason
• штраф отменили = main clause

So the comma before штраф отменили is required.

The comma after того is connected with the compound conjunction в силу того, что. In formal Russian, this kind of expression is often written with a pause before что. You may also sometimes see similar compound conjunctions written without splitting them, but the version in your sentence is a very common formal pattern.

It comes from the noun неоплата, which means non-payment or failure to pay. This is a noun built from:

• оплата = payment
• не- = not / non-

So неоплата is a bureaucratic-style abstract noun, not an everyday conversational word.

In the sentence, it appears as неоплаты because нет normally requires the genitive case.

Compare:

• Есть оплата = there is payment
• Нет оплаты = there is no payment

So:

• dictionary form: неоплата
• form used here after нет: неоплаты

Because it depends on the noun неоплата.

You can think of it as:

• неоплата чего? = non-payment of what?
• парковки = of parking / of the parking fee

So there are actually two different reasons for genitive here:

1. неоплаты is genitive because of нет
2. парковки is genitive because it depends on неоплата

That is why you get two genitives in a row:

• неоплаты парковки

This is normal in formal Russian, even if it looks heavy to an English speaker.

It is understandable, but it sounds quite bureaucratic and a little clunky.

A native speaker would probably recognize it as official or legal wording rather than natural everyday speech. More idiomatic alternatives might be:

• Факта неоплаты парковки нет.
• Нарушения не было.
• Парковка была оплачена, поэтому штраф отменили.

So the original sentence is not wrong as formal language, but it is definitely not casual.

Нет is present tense, so literally it means there is no. In an official context, that often means:

• at the present moment, there is no established fact of non-payment
• therefore, the fine was canceled

So the logic is something like:

• Since there is no non-payment on record / no basis for claiming non-payment, the fine was canceled

If the sentence used не было, that would focus more directly on the past event itself:

• there was no non-payment

Both are possible in principle, but they are not exactly the same in emphasis:

• нет = current assessment or current legal status
• не было = past factual situation

Both are possible, but штраф отменили is very common Russian.

This is an indefinite-personal construction:

• the verb is in the 3rd person plural
• no subject is named
• the meaning is roughly they canceled the fine, but English usually translates it as the fine was canceled

Russian often prefers this structure when the doer is obvious, unimportant, or not named:

• Мне сказали... = I was told...
• Документы отправили = The documents were sent
• Штраф отменили = The fine was canceled

So even though the verb is plural, it does not mean a literal plural group is important here. It is just a standard Russian way to leave the agent unspecified.

Because the sentence is talking about a completed result.

• отменили = perfective past, meaning the cancellation happened and is finished
• отменяли = imperfective past, which would suggest process, repetition, or background information

Here the point is the final outcome:

• the fine ended up canceled

So perfective is the natural choice.

Yes. If you want less legal-sounding Russian, you could say things like:

• Парковка была оплачена, поэтому штраф отменили.
• Так как парковку оплатили, штраф отменили.
• Поскольку нарушения не было, штраф отменили.

These sound more natural in ordinary language.

The original sentence sounds as if it came from an official explanation, appeal decision, or administrative notice.