DSTV (Multichoice) - Bunch of *******!!!

I cancelled my DSTV account and confirmed with the agent that it is cancelled. I even made sure to verify what will be debited off my bank account and I was told that I would only pay a cancellation fee. Double checked on 01 October and my services are definitely cancelled but then my bank account debited with 1 months instalment plus the cancellation fee. In my book that is called *****!!! You cancel my services but then still collect the money. Then when I call the customer call centre I am told it will take a few days to reverse back into my account. How is that possible!!! DSTV will never see me ever again.