Day light *******

Am never using FNB again. I had a credit card with them for years until now recently i decided to pay it off and close it. On 1st March 2021, i went to a fnb branch to close the account but was rather assisted to log a call to their credit card dpt. I spoke to one of their call centre agent and was given a settlement amount to pay before i can be able to close the acc. The very same day, i made the payment, email the requst form to close the account with 0.00 balance. On 9 March 2021, i receive an email that i need to pay R305 before they can close the account because of interests and credit card fees. Why am i charged credit card fees while i requested for that account to be closed a week ago and i was given a settlement amount for it to be closed?? Ive been calling them couple of times and im not get any satisfactory assistance. NO MORE FNB