Bad service, bad attitude, wrong contracts

I downgrade from a Talk 1000 to a Talk 500 on a red advantage plan. I ask for a contract with more data and less minutes. After a few months, I checked my accounts and saw that they still did not downgrade to a Talk 500 and I stil pay for the Talk 1000. I visited Kimberley, they told me that they couldn't help me I must visit the Bloemfontein branch. I live in the Northern Cape and does not go to Bloemfontein very often. I called Bloemfontein but they told me to visit the branch and that they couldn't help over the phone. Eventually I went to Bloemfontein, and complain. They then told me that this was a premature contract (I was not inform when I upgraded because I was in the branch to buy a cellphone cover when the consultant ask to see if I can upgrade) The system shows that the consultant did quote for a Talk 500 on the Friday when I was there. but then he deleted it on the Saturday and the contract was then for a Talk 1000. I wasn't even there on the Saturday. The outcome was - I requested the original contract, but nobody can provide it. And nobody try to help and solve the problem because the debit order goes of every month. I must pay and they smile.