Paying an installment on a paid up and closed account.

After having closed my blue bean credit card on the 12th of last month , Standard Bank take an amount of almost R900 of my account today . When I call in to the helpdesk I get fed some drivel about the card still been live and transactions can be performed on this closed account . The story eventually emerged that the person who closed the account forgot to cancel the debit order . I advised I was unhappy and I wish to speak to a manager as I wished to take this matter further as I see this happens often . The response I got was you cannot speak to a manager but I will see if a team leader can assist you. ???? And they have not . . .