vodacom allow people to ***** off their network

i keep getting charged for services i have not subscribed to - Vodacom says its my fault i must be subscribing to them and i am not i have phoned in several times and they stop them just for them to reappear i dont have this with my contract phone so this must be a prepaid problem for sure

surely they must be able to prove that i subscribed - because i should confirm either by sms or email that i confirm my purchase or registration this is a **** and i am losing R100's of rands due to these scrupulous operators and vodacom takes no accountability - of course not they get to sell more and more airtime