No paid up letters after accounts settled, after following up numerous times.

One positive and then back to negative. So after resolving my initial complaint, I settled all my accounts according to the settlement letter on 28 August 2023. I forwarded all proof of payments to the relevant email addresses. Proof of payments for the credit card, Revolving loan, overdraft and my Cheque account. I further more requested that all accounts be closed off and that paid up letters be forwarded to me. So on 29 August I received 1 paid up letter for the revolving loan. Its now 5 September, I have followed up numerous times about the other paid up letters, was promised that I would receive another one by cob 4 September, needless to say nothing received. Why does one have to turn to social media to get matters resolved? I paid all accounts as per the settlement letter. One of your agents confirmed ALL funds were showing in the accounts on 29 August already. All im asking for is my paid up letters and CLOSURE of all accounts? Whats happening to service levels at FNB???