Credit card billing after closing

This is my second complaint regarding this division of Standard Bank Credit Card. I was contacted by them after I logged my complaint about given the wrong settlement amount twice and refusing to close my credit card. I was informed that my card will be closed immediately and all banking fees will be reversed as I was wrongfully billed. I was also told that all will be send to me via email for proof, and I have not received anything to date. I received a statement yesterday 21/06/2015 which showed a balance due of R31.45. How is this possible if the account is supposed to be closed. the reply from the consultant to whom I spoke to was that I must settle this amount, but don't worry, this account is closed.?!?!?! I asked the consultant to send me an email showing this card is closed, I have not received anything. This won't be the last time that they will hear from me if this problem is not fixed within the next 48 Hours!! I am sick of this. Maybe they should get tips from Virgin Money Credit Card for Excellent services.