STILL WAITING FOR FEEDBACK FOR THE SECOND TIME

In February Cell C phoned me to say that I can upgrade on my contract. I was not going to extend my contract with them because of the poor coverage, but they offered me a good deal for less than I was paying. So I accepted the upgrade. Right after I was billed double the amount I was supposed to pay and again almost double the next month. I never received a statement or invoice of any kind. I phoned in the beginning of May and spoke to a supervisor who told me that whoever phoned me for the upgrade, upgraded me right away but apparently my contract has not expired yet. THAT IS NOT MY FAULT!!! I never told them to upgrade me with immediate affect! They were suppose do upgrade me after my contract expires. I told them to send me the tape and listen to it. I never heard ANYTHING back from them. I phoned again last week and they again said that someone will get back to me within 48 hours. Still have I heard nothing. No solution to this problem. UNACCEPTABLE SERVICE!!!! Someone did something wrong and they are doing NOTHING to sort this out. I wil NEVER EVER EVER EVER IN MY LIFE deal with Cell C again after this contract has expired!