Frustrated Telkom Customer

I had an existing account with Telkom which I wanted to cancel after the 24 month contract period. When doing I discovered that my contract was upgraded without my knowledge and when I wanted to cancel my contract I was told I could until such time that the remainder of the contract time was reached (24 months) No one from Telkom wanted to assist and I was told to cancel via Telkom online. How do you cancel a contract that was upgraded and to date I am still paying because Telkom decided to upgrade me. Never take a contract out with Telkom because you will have it for life. Can anyone advise me how to go about getting this contract cancelled as not even Springs Mall Branch will assist me. They keep on referring me to doing this via the internet which is a hopeless case as it still shows that my contract is active. I am so frustrated that I cannot get this resolved. Any advise out there please?