Bad service

I previously phoned for a paid up letter for my temporary loan that was paid off in last year july already. I was told to go to the branch. Today i come to the branch and am told to phone to request the letter. I phoned 3 times already within these past 2 hours. I was told i can only receive it with 2 days, which is by tuesday. I explained the urgency of it and was told that they'll put me through. Now, after the 3 try, i gave up. I am a private client that's been banking with fnb for 4 years now and i am very unhappy with the service i have been getting from fnb and will definitely be moving to another bank as soon as I can.