Close my credit card a.s.a.p

I have a credit card with FNB for the amount of a big amount. I made if fully paid up and wish to close it as I feel I use the card too easily and get myself in to unnecessary debt. I did pay if off on a previous occasion asked F.N.B to close it and it never happened. Did send them the e-mail to the provided address. As I said I then use the card can again and I had to pay it off once again. The card is fully paid but FNB is now taking their time to close the account. What is my right I'm to close this account a.s.a.p. I'm a so called \Premier\" (falls advertising) account holder yet when I had to take off work to go to the bank I had to sit in a line and my ticket number was 24. So I left the branch and send you a request via Interbanking to call me, which also never happened. I call you yesterday to close my credit card which I was informed to pay in another R188. In my opium my card is paid up. I did pay you and phoned again. The problem I feel you must close my card A.S.A.P as I'm feel at risk for internet ***** with all this money. PLEASE close my account It's nothing personal I want to get rid of my debt. If you call me do so after 13H00 as I'm in a meeting"