Useless FNB- Holding my money hostage

Hi, I requested a settlement letter from FNB to settle my credit card. I receieved the letter- very silly- it does not state where to pay the amount. So I chatted online with a consultant- Linda who told me to pay into the suspense account ***, which I did immediately on the 21st. I have now been called and advised that this is a personal loan account number and I should call them and ask them to reverse the funds or to pay into my credit card- when I called them the lady didn't even understand what I explained and just transferred me to the credit card department. By the time this is resolved my settlement figure will not even apply, and my next instalment will go off- WHICH IS WHAT I DON'T wants- FNB is a bunch of ****mers and I am so glad I am moving away from you guys completely!!! Fix this internally and settle my card! it's my money you are now holding hostage and giving me unnecessary stress to sort out. Useless bank