Literally the most useless *****s in customer service

I already submitted a complaint several days ago- 2 consultants contacted me to tell me someone will be in touch to resolve the issue and send me my paid up letters. Still havent recieved them. I have literally received paid up letters from all my credit providers within a week after I settled all my debt. Everyone except fnb- its been almost 3 weeks now, I keep phoning- waiting on hold for someone to answer, I have sent emails with my proof of payments, sent facebook messages, gone into my nearest branch. We are trying to buy a house - and fnb declined our home loan application because Im still listed on debt review- because of Fnb!? If you had sent me my paid up letters 2 weeks ago like everyone else did, this wouldve been resolved by now. Cant believe how absolutely PATHETIC your customer service is!!!!???? What do I need to do to JUST GET MY PAID UP letters! I have never been behind on payments, I settled my whole credit card and loan in full, I have been your customer for almost 10 yrs and this is the service I get? You cant even be bothered. How hard is it to type out 2 paid up letters and email them to me! I am very irritated. Sort this **** out by tomorrow or I am going to get an attorney involved. I will definitely be closing my fnb account and moving to any other bank after this. Useless bunch of *****s.