Credit card cancellation

Hello Peter I have a credit card account with FNB which I tried to cancel from the 10th August. I completed the cancellation form at Attlyn branch on the 10th, ***. They told me that it will take 5 days. Saturday the 17th I went to the branc again for follow up. After holding for consultant for almost an hour I was told that is is escalated and it will take 48 hours for me to get the cancellation confirmation. Ref***. Now the card will generate interest which bind me to pay because of their poor service. When they phone to offer credit card everything is very fast but when one decide to cancel it becomes a hassle. Please help to get my card cancelled.