Poor customer service

I opened fusion account with FNB in 2019,later that year I lost my job and I couldn't pay back the money that was deposited into my account,then my account was handed over to Norman Bisset attorneys...In 2021 I got a new job and I managed to settle that amount of money that I owed to FNB,since October last year I've been calling them to send me a paid up letter,I even went to FNB branch to seek help with my settlement letter,I didn't get any help...Its frustrating