Cell C is now *****ing my money.

I had an issue where ********** contracts were taken in my name. Two contracts in two successive days. Cell C has allocate me my number back. However even after determining that that was ***** they are still billing me for that ********** contract. I think I must now take them to court. Yesterday they deducted R3000 from my account. Claiming I am in arrears. How can I be in arrears for something which I never signed up for? And their call centre people ask stupid questions and just don't seem to be able to understand.