Disappointed with First National Bank

I have been a client with FNB for a very long time, unfortunately I had some financial difficulties and had to go under debt review. Last year September I managed to settle all my outstanding accounts and rehabilitated from debt review. I have always been very happy as a client with FNB but at his moment I am so frustrated and feel the way FNB is dealing with my problem is very disappointing. I had an FNB Private Clients Credit Card. This is one of the fist accounts I settled in October last year. Since then I have been trying to get a settlement letter from FNB and I have had no luck. I have spent hours on the phone and sent numerous emails. Two home loan applications have been declined because of the lack of cooperation being received from FNB. I again phoned today but was sent from pillar to post once again with no luck. They keep on telling me that I will have to wait 5 working days. It's been a year now. I am again applying for a bond, and they requested the settlement letter again today. If I don't receive same today - I am once again not going to be approved. I really do not know what to do anymore.