FNB - How can we do a bad service for you!!!

My account has been cleared for 3 Months!! I've called their debt review center more than 5 times, my debt Councillor has also called them and emailed them numerous of times and they are experiencing the same thing that i'm getting at the moment.. I've been to the branch and I've sent emails requesting my last and final creditor paid up letter. I've had no feed back from anyone that assisted me. neither the letter. I need this letter because it clarifies my record. FNB has the disappointment me a lot through the years, even when I've said no to an Overdraft, they've used my voice as a signature and that alone has given me a bad name!!! Worst Service ever. I will not recommend FNB for anything to anyone!!