CHANGE OF OWNERSHIP ON CONTRACT

I wanted to change the contract from my Dad's name on to mine as the debit order's are already going off my bank account. I went to the bank and got 3 months statements, I got my payslip and proof of residence. I got a copy of my Dad's I.D and he wrote a letter and signed it giving permission to change the contract over in to my name. I took my lunch hr and waited over an hr to be assisted. I filled in a form that they gave to me and signed it. Gave them all the documents including a copy of my I.D. The lady said it should take 24hrs to change over. After a month I received my Bill still addressed to my father's name. I am based in Richards Bay and my father in Ballito. I sent e-mails requesting why the change has not been made with no response. Now I am due for an upgrade. Cell C phoned me. I explained to them what had happened a year ago already and that the change of ownership has still not been done. Since I haven't heard anything from Cell C. Now I can't upgrade unless my father goes into Cell C in Ballito. Now they want me to go back to the bank to get the documents ALL over again, go back to Cell C and wait in the queue again because someone didn't do their job. SERIOUSLY!!!