Contract I did not authorize

I am appalled by the customer service that mtn provides. Not only that but the fact that they have agents who perform ***** against customers like me. Here's what happened.... On October 12th an mtn agent called me with regard to a contract which I gladly declined because I am unemployed. However she still went on and added this contract onto my name and on top of that added another mtn number which I do not even know, onto the contract. Meaning she added 2 contracts on my name that I did not authorize. Since then I have been calling mtn numerous times. To get this canceled of my name. And everytime i called no one seems to be helping me. They either say that they can't do anything about it and I either need to pay a cancelation fee of +-R400 or keep the contract. I'd ask many times. Why should I be paying for something I did not take up. And I get no feedback and help. They keep telling me they can't do anything else. I even requested them to do an investigation. But they Said it's not possible... how can a huge network company like mtn refuse to help a customer in need. This isn't the first time it happened to me with mtn via Mondo... the exact same thing happen many years ago and years later after numerous phone calls the situation was resolved. I ain't waiting years for this to get resolved. I need help NOW. This is such disgusting and disappointing customer service from mtn. I have been a loyal mtn customer for over 15 years. And this is the thanks I get. This is extremely frustrating. This is a ********** tactic that's being used to gain money because I am being forced against my will to either continue with the contract i did not authorize or pay 400 cancelation. What do I do going forward in this situation?