Upgrade failure

Since last year September I have been trying to cancel my contract. Eventually in January I tried again and spoke to a lady who made me an offer to upgrade that I could not refused. Some weeks later the upgrade did not happen so I called again and was told that the upgrade was not submitted. Waited weeks again and then was adamant to cancel. Another lady said that she would fix it for me. I got offered 1000 minutes, some data and airtime for just over R330. I had to agree to all the terms and conditions and agree on the renewal - I could see SMSs coming through confirming what she was saying. This morning I have something but I don't really understand what because it is not the contract that I legally agreed to. No minutes, no data, nothing. I am sick of phoning Vodacom. All the voice logs will confirm what I am saying - many calls (at least 15). I have been a very loyal customer for many years. You are in breach of the contract I have agreed to. Fix it or cancel the contract so I can move it to MTN.