Maybe this is the reason for the ban "Being a fully verified user since years" I mean maybe they need to get new documents with new dates, or maybe the account has been inactive for a long time.

In any case, these are insufficient excuses since you provided the new information according to the form. This is the problem with centralized exchanges, as your account can be banned at any time without clear reasons, and they are good at making up false excuses to cover up their failure.