Suspicious

There is an unknown number (contract) on my profile. Cell C can't send me proof that I app**** for this contract. The amount deducts with my other contracts so I can't cancel it at the bank without disrupting my connectivity. What am I to do as Cell C simply does not care to assist. I went to Menlyn branch for an upgrade when I first realized what is happening. They couldn't help and said I must phone 084 143 option 2. That was a hell of an experience with absolutely the worst service ever except for my last attempt where I received a unsigned contract. I reported the case to the ***** department but no response from anyone.