Mxm sick and tired of Vodacom mxm

Really angry my bill today is saying I am going to pay R200 they keep increasing the amount of airtime or data I never requested to be part of the month to month contract,when I went to the shop to go take up this contract I made it clear that I want a month to month not a contract if I want to cancel it month end I should be able to do so now they are refusing to cancel and are telling me it's a month to month contract for 24 months which is not what I was sold when I opened it I asked her is she sure they won't give me problems when I want to cancel she agreed now I can't cancel and then on top of it they are increasing the airtime borrowed or used to the contract my bill mover from R70 a month plus R10 for the number to not received private calls at this rate I am now going to pay R200 this month end something I never wanted . Please help me get this guy to cancel and change my number to just a contract number only. So angry and sick and tired of Vodacom taking money away from my children's food