Уведомление об операции пришло: лимит на переводы изменён. Свяжитесь с банком.

Russian uses о / об / обо for about / concerning. The form changes for pronunciation.

• о is the basic form.
• об is used before many words that begin with a vowel, to make pronunciation smoother.
• обо is used in a few special cases.

So:

• о банке = about the bank
• об операции = about the operation / transaction

Also, операции is in the prepositional case, because о / об requires that case.

No. In banking and financial contexts, операция often means a transaction or account operation.

So уведомление об операции means something like:

• a notification about a transaction
• a transaction alert

Russian often uses операция in official or banking language where English would more naturally say transaction.

The subject is уведомление.

• уведомление = notification
• It is neuter singular
• Therefore the past tense verb must also be neuter singular: пришло

So:

• уведомление пришло = the notification arrived / came

Compare:

• письмо пришло = the letter arrived
• сообщение пришло = the message came
• документ пришёл = the document arrived (документ is masculine)
• посылка пришла = the package arrived (посылка is feminine)

Russian often says пришло literally came / arrived for messages, notifications, letters, emails, and similar things.

So Уведомление ... пришло is a very natural way to say:

• A notification came
• A notification arrived
• You received a notification

English often focuses on the receiver: You received a notification.
Russian often focuses on the notification itself: The notification came.

The colon introduces the content or explanation of the notification.

So the structure is:

• Уведомление об операции пришло: = A notification about the transaction arrived:
• лимит на переводы изменён. = the transfer limit has been changed.

It works a bit like English:

• A notification came: the transfer limit has been changed.

This punctuation is common in formal notices, app alerts, and system messages.

Here на means something like for or on in the sense of a limit on transfers.

So:

• лимит на переводы = transfer limit / limit on transfers

This pattern is common in Russian:

• лимит на снятие наличных = cash withdrawal limit
• запрет на въезд = ban on entry
• разрешение на работу = work permit
• цены на билеты = ticket prices

So на often links a noun to the activity or object it concerns.

Because the sentence refers to transfers in general, not one specific transfer.

• перевод = transfer
• переводы = transfers

So лимит на переводы means the limit on transfers as a category of activity.

Russian often uses the plural this way when talking about general types of actions or items:

• цены на продукты = prices for food products
• налог на автомобили = tax on cars
• спрос на услуги = demand for services

A singular form here would sound more specific or less natural in this context.

This is an important difference.

• изменён = changed in the sense of has been changed
  This is a short passive participle.
• изменился = changed in the sense of changed itself / became different

In this sentence, the idea is that the limit was changed by some outside action, for example by the bank or the system. So Russian uses the passive-style form:

• лимит изменён = the limit has been changed

Compare:

• план изменён = the plan has been changed
• расписание изменено = the schedule has been changed

But:

• погода изменилась = the weather changed
• ситуация изменилась = the situation changed

Изменён is the short form passive participle of изменить.

Short passive participles are very common in formal written Russian, especially in notices, reports, and official messages.

Here are the gender forms:

• masculine: изменён
• feminine: изменена
• neuter: изменено
• plural: изменены

Because лимит is masculine, the sentence uses изменён.

Examples:

• заказ оформлен = the order has been processed
• карта заблокирована = the card has been blocked
• данные обновлены = the data have been updated

This style is especially typical of bank messages and system notifications.

Because this is the polite/formal imperative.

Russian uses the plural form both for:

1. speaking to more than one person, and
2. speaking politely to one person

So:

• Свяжись с банком = Contact the bank.
  (singular, informal, to a friend or someone you address as ты)
• Свяжитесь с банком = Contact the bank.
  (polite/formal, or plural)

Bank messages always use the polite form.

Because after с / со meaning with, Russian uses the instrumental case.

So:

• банк = nominative
• с банком = with the bank / contact the bank

After связаться с кем? с чем? the noun goes in the instrumental:

• связаться с оператором = contact the operator
• связаться с клиентом = contact the client
• связаться с банком = contact the bank

So you should learn связаться с + instrumental as a set pattern.

Связаться с means to get in touch with / contact. It is broader than call.

It can mean:

• call
• message
• reach out
• contact by whatever method is appropriate

That is why it is common in formal messages. It does not specify the method.

Compare:

• Позвоните в банк = Call the bank
• Напишите в банк = Write to the bank
• Свяжитесь с банком = Contact the bank

The last one is the most neutral and official.

Yes, it is fairly formal and institutional, especially because of:

• уведомление
• операция in the banking sense
• лимит на переводы
• изменён
• Свяжитесь с банком

This sounds exactly like a bank app, SMS alert, or customer service notice.

In everyday speech, a person might say something less formal, for example:

• Пришло сообщение: банк изменил лимит на переводы.
• Мне пришло уведомление, что лимит переводов изменили.
• Свяжись с банком.
  (informal)

So the original sentence is natural, but specifically in an official/service-message style.