FNB abusing my right as a client and overcharging me on credit card.

On the 29 April 2021 I paid and settled the full outstanding amount on my FNB credit card and I personally phoned FNB credit card division to close my account as it has been fully paid. The guy I spoke to said because the debit order is already loaded it will go through. I then said to him its now fully paid can they close this credit card account. Surprisingly FNB undermining me as a paying client they never closed this credit card account but kept on charging me in May 2021 and now June 2021 while the account has been fully paid and despite me telling them to close it.

This bank has been keeping on charging me on my hard earned cash not taking me seriously as a paying clients, what they have done is undermining me and ripping me us.

All the monies they have charged me while the credit card has been fully paid must be reimbursed to me.