Nedbank Garage credit card additional card fees being charged and never had an extra card

I have been a loyal customer for years having current account, business account, credit card etc and am totally fed up with the service from Nedbank credit card division. I have had a garage credit card for years with nedbank and since last year April I am being charged for an additional card fee every month when I have never requested for an additional card ever nor had one as I am the account holder and no one else uses my accounts nor do I have a spouse etc. I have phoned three times now and every time I phone to customer service and give my reference number, I get told it has been esculated to the team leader and please to wait five working days and it will be resolved and they will reverse all the charges. Its been over three weeks now and get my current statement to see I am being charged still for an additional card and none of the charges reversed. This is ricidulous and I am at the point where all my banking with nedbank is going to be cancelled and I am going to go to another bank. I have already open current and business account with another bank and the service is outstanding as well as the banking fees are less etc. Reference ***7