Extremely Poor Service

My spouse has a garage card which is linked to my personal cheque account. Have tried repeatedly to have the debit amended the credit card account...no feedback to date as you are transferred from Card Division to the branch and vice versa. Secondly I have cancelled credit cards with Standard Bank and have received a letter stating the debit order must be cancelled at the branch. It seems neither Card Division or the Branch cannot assist. How do you cancel a debit order if staff are confused.