Vodacom cancelations

Called in for the 10th time today since February trying to cancel my contract. Advised that I must wait for the incorrect upgrade to cancel at the end of this month!!!!!!!!! Since Feb? Is that right? I've canceled my debit orders at the risk of damaging my credit score because vodacom upgraded me by mistake when I tried to cancel! Sickening treatment. I am going to convince everyone I know to never go to vodacom because leaving is worse than a divorce, it's just impossible!!!! Also wrote a review last month here, agent called and promised to cancel the contract... here we go round 2! Please help!