No cancellation done - Credit Card

I have had a Absa credit card for a long time,but for the last two years have not used it, for the last year i did not even have a card.I don't owe any monies on it.I have been to the branch to cancel and they informed me that I cannot cancel at the branch only via Phone. I paid the monthly interest that accumulates inside the bank and phoned to cancel - which the call center said would be done. This was about 6 months ago. Only to find out 3 months later that it still was not cancelled. I then went into the Absa branch in Mall of Africa where a manager of some sorts phoned the call center after taking monies from me again for interest. I spoke with them from the branch's phone and they assured me that it would be cancelled. It is now three months again and you wont believe it it is still not Cancelled. I am appalled at the poor service delivery and poor interaction with their customers. I have already closed a savings account that I had with Absa for many years because of their poor service, and this just proves that they are absolutely useless. I have a really good credit rating and am a private client from Standard Bank.