MBD Continuous Harassment &Failure to follow up on query Cell C account

For the past 2yrs I have been to resolve an exceedingly billed account from CellC, I was calling them to look into the matter. Sent emails to the departments I was told to but I barely received a proper response. I had a 2GB data contract with them for R99/month so when I received a bill for R3000 I immediately questioned it. I was told by the consultant that it was made an open line for R15 000 and that the account seems to have been hacked. The following month i receive a bill for R4000. Shocked beyond belief i called them and asked what is happening with my first bill query as I now received an account for a ridiculous amount. That investigation turned out to be fruitless as I could not get a proper answer. When I took out the contract, I specifically asked that should I reach the limit, the line would be suspended, I was assured it would. But this seems not to have been the case. I requested itemised billing to see what sites were logged onto to, received that, so I tried one & it did not pick up the w/site address. I called back and told them & had to send an email to a supervisor, but no response there. In trying to sort this out and continuous calls I was getting nowhere, CellC decided to hand me over to MBD. When they called i explained the situation, again was told to send all correspondence & affidavit, which I did. They still keep calling, sending emails & sms's & I have to explain myself all over again. I'm getting tired of this & because no one is resolving this matter, my credit rating has now been affected by it! These people are harassing me every week, say they going to follow up but no one does and then the agent is ****** rude. Bottom line I signed up for a 2GB data contract for R99/month and did not request that it be an open line. I will not pay the +- R7000 that they say I owe. Just typing out this complaint is draining as it is such a long story and has been going on for 2yrs now.