MULTICHOICE (Dstv) *****ing money from myself every month !!!!!

DSTv (Multichoice) is taking money from my account every month while I am not even one of their client. I am not sure how they even got hold of my banking details. They are *****ing money from me every month.

I am not sure why such a big Company would do such. Every month I have to phone my bank to reverse the Debit Orders that they run through my account.

Please urgently assist me before I go crazy.