Billing for a contract I never had!

<p>I cancelled one of my contracts with Vodacom on the 7/12/2016. When I called them to query the high amount that I was billed for Dec, I was told that because I cancelled in the first week, I am still liable for the payment for the service I received for the entire month! However the consultant kept reading out an incorrect cell number ( ********** 662), when I corrected her, she insisted that I have this contract showing under my name. I receive my bills monthly and my account is always up to date. How is it that after I cancelled my contract a new contract suddenly appears on my account! She tells me that this contract has been on my name since 2013! What a load of *******, so why was I not billed for that contract since 2013? Why now in 2017? I asked them to fix it but I am told that I must go to a police station and get an affidavit to prove that I don’t have this contract!!!! They make a mistake and now I must be inconvenienced to prove to them that I don’t have this contract, what an audacity!!! Vodacom must fix the error as I will not pay for that contract! </p> <p> </p>