I'm been billed for a phone I don't have

On November 3rd 2015 I obtained a phone which I didnt request for I then took the phone and called cell c customer services and then told them I specifically did not ask for this phone n the contract needs to be canceled immediately. The courier services ram to be exact picked up the phone on the 20th of November it is now the 9th of december the contract had not been canceled and no one has contacted me. I am paying for a phone which I don't have. absolutely upset as cell c call centre staff told me they will contact me and refund me two months have gone where I have paid for a phone that was still sealed in the box when I sent it back!