Disgusting service

Mtn is really abusing me. I had a contract for the 2 phones where the billing was OK all along until this time. It's been a while since I have been trying to reason with customer care without luck, been taken pillar to post. It doesn't seem like they are willing to resolve my matter regardless instead my credit would be turnished as they say. My contract as per their consultants who have been calling me non stop since March that my contract is due in May for upgrade or cancelation where they were offering me phone packages but I didn't want any more phone I chose to cancel. As you know that these service providers wouldn't dare leaves you without coming up with something that they know you wouldn't refuse, they now offered me a data of about R179/monthly where I had to opt off hence I do not have any other business with them anymore. But hey, come month end I see a bill of almost R600. When I quiry is like call transfer to all these departments with no one helping me with my matter. Until I had to track down the gentleman who sold me the data contract so he can clear the matter as I feel I was fed with wrong information just so they sign up me. To my surprise I have been receiving the bills even after. The gentleman commented to assist but I still don't see anything different. Can anyone sort out the matter. I have already sacrifice for the unauthorized payments for 2 months but unfortunately I can't go on paying for this, sorry I'm seriously feeling so ****ed with this, especially the fact that nobody seems to be caring about this I am definitely not gonna rest until someone hears me. Will make sure that I involve Consumer council if I have to