Netflix account that doesn't exist

Dstv has been ****ming me R200 extra since the beginning of the year, I was paying my premiums via debit order only for me to notice that instead of paying R500 they're debiting R700 with an excuse of saying I have Netflix of which I don't, they've never called nor did I call for them to add it to my premium, now I can't watch TV coz they want me to pay the R700 that I didn't sign up for. I want my refund and people paying via debit order should be more careful, dstv is ****ming and adding unnecessary subscription without our knowledge. I'm so disappointed