Incorrect billing

I called last month as there was an incorrect amount debited and I was told the additional R199 it was for Netflix. I advise I did not sign up for Netflix as I have a separate account with Netflix. I asked for cancellation and refund, I did not get it. This month same issue, I called last night and I spoke to a very clueless person who called me by different names which I don’t know. She did not know how to resolve my issue. Until all is resolved I am not paying for Dstv and I have advised my bank to not allow the debit order to go through.