High priority complaints

The service I'm currently receiving from this bank is absurd. Since the day I downgraded my account, it appears that they no longer value me as a client. I've been complaining about incontact messages from another account holder's account since August/September. I always get an automatic response with a reference number and acknowledgement of my inquiry/complaints. Weeks will pass with no communication. I received an email at the end of October stating that I would no longer receive incontacts because my number had been removed from that customer's account, but on that that very same day I receive up to 6 messages, the account is very busy and today was also a very busy day on that account, it's like this also on any given day. On the day I was notify via email that my contact nr was removed , i immediately informed them that the craziness had not subsided and even showed them screenshots... AND AGAIN UP TO AND INCLUDING TODAY NO CONTACT FROM FNB