How long does it take to change the entity type of the account from Individual to Organization? I changed my account entity from individual to organization two weeks ago, but it still hasn't changed. How long does it take?

Hi. I am trying to enter my card number in the bank account field in the Apple Developer program. I switched to the Agreements, Tax and Banking tab. I selected the Paid Apps tab. Change the bank account. I have entered correct information in all fields. But there is an error in the Account Number field (as I understand it, this is not an IBAN, because I have already entered the IBAN in a separate field). Error name: The account number is too long. Required number of characters: 15. But there are 16 characters on my card. What is the account number to enter then? The country is Montenegro.