MTN IS PATHETIC!!!!THEY ARE ***********!!!

So where do I begin my journey to disaster with MTN..I signed a contract with MTN in 2011, which I must add that MTN has no record of, yet I have the signed contract with me on paper. This account was in my Mothers name & I then took over the payments & the account as the phone was mine. The account was never in arrears and this I know for sure as my Mom is very financially structured and HATES bad debt!! I then got a new number and phone and my Dad then wanted this contract. So we went to Clearwater Mall where we were assisted by a sales consultant by the name of Percy, his name and signature is on the copy of the contract that we have, he helped up to do the signing over of the contract from myself to my Father. The account at that time had monies to be paid in order for the contract to be moved over from me to my Dad so we paid that fee and the contract was suppose to be put into my Dads name, which WAS NEVER DONE!!I am getting calls that I owe MTN money and I will be listed. I HAVE ALL PROOF OF THIS ACCOUNT,PAYMENTS AND CONTRACTS!! IF I GET LISTED I WILL SUE MTN FOR ALL THEY HAVE!!!!!NO ONE FROM MTN OR VVM ATTORNEYS CAN GIVE ME PROOF THAT I OWE THEM AND FROM WHEN!!WHY?