Standard bank

Have been battling for a month now to close my Std Credit card but its near impossible. There charges are over the top...each time I do an electronic payment it costs R9.00 Plus bank fees and bank charges plus they are charging me for an extra card which no one can throw any light on. I have made numerous calls, all costs a fortune as they don't come out of my airtime. I went into the bank for over an hour and that didn't help as I was put on a phone and got nowhere......they promised to call me back and a week later I am still waiting..........all this time I'm getting charged fees, bank charges etc. Cannot recommend the service of Std Bank or their card division at all.