Failure to close as promised

I am getting totally annoyed with this bank and staff. I spent ages on the phone to a lady who agreed to close my account. I was previously told how to cancel my credit card which eventually happened but still Discovery Bank kept charging. The lady said she would ask for a manual closure of the account today. I will receive notification of closure. Now I see they refuse to close unless I pay two months charges when i did not have the card running. Discovery bank is a shark and are totally useless. I never asked to join so I cannot even say it was the worst decision I made because I never made the decision to join in the first place. I refuse to pay for something that should never have been charged. This account should have been close a long time ago.