Multichoice ignoring my cancellation. *****ing my money and refusing to pay it back.

I cancelled all services in November 2018. They still debited money from my account on January and February. The call center is just ignoring my requests to return the money. They are refusing to provide written confirmation of my cancellation. They are *****ing from my account. I have now resorted to blocking Multichoice from debiting my account. I will not use their services again, since they are hellbent on *****ing from me.