Poor service

I have been with multichoice for a number of years now, I have been calling them for the last 3 months wanting to cancel 1 of my accounts that I have with them. The first month, I was told that it was cancelled and that they are going to credit my account. Second month , the same thing happened, now I just received an sms to say that they will be debiting my account again. Clearly no cancellation was done. Am not sure what to do or who to call at this point. Am paying for services that I do not need.

Really disappointed.