FNB - Do better!

Really unhappy with the customer service of FNB. As a loyal customer, one should not battle with assistance. I have closed my credit card account, only to find out it was still active. The entire thing is paid off, however R340 interest was added to a zero debt balance. After it was explicitly explained that the account and card need to be stopped. This was done in the branch, over the phone. So recordings should be available. A week later, i call to find out what is going on, just to be placed on lines with multiple consultants as well as multiple different numbers to contact. No help or resolution was given and now i am liable. This is unacceptable.