Rip-off from DSTV(Multichoice)

I am being charged an amount of R199 every month for Netflix subscription through DSTV since February, but I have never subscribed for that service. I have spent a lot of money calling Multichoice every month to cancel the service but nobody is able to help me. My name does not appear under Netflix, my details are not there, and I don't have access to the service in any way, I never had access, yet I'm paying for it. Can anyone please help me get rid of it and get my money back. Every time I call I am told someone will call me back but it never happens. Ten months down the line they're still enjoying my money.