FNB account closure

On 16th of August 2025, i closed my FNB cheq account due to radicicolous high fees. I cleared the bank balance to zero and closed the account on the banking app. I received only a pop up on the FNB app stating, the account has been successfully closed and a letter is available in my vault. Needles to say, no letter was received. I am being handed over now for costs accumulated for bank charges after i closed the bank account. I've also been struggling to get assistance on the banking app, where i held on for over an hour , just to be cut off. FNB can waste their time and effort to try and collect. I have my prove that i did close the account.