Disconnection and wrong billing

Dstv multichoice has failed me as customer, last two months I had a problem with them because they were charging me for Netflix that I didn't have, now they failed to fix the problem, now they keep disconnecting my services because they say I the is an outstanding money I need to pay because of the problem they failed to fix and I have been to their offices in rand burg and I made so many calls to their call center but no help as we speak now it's my fourth time being disconnected in one month and I have payed but the treatment is bad please help if u can I am really frustrated now