TIRED OF MTN PATHETIC SERVICES

I have been using MTN for the past year using a contract phone. I had an agreement with them that ill be paying R200 every months with them. They have stopped taking money in and now are constantly calling my father that my case has been handed over to the lawyers. I have tried calling MTN for the past 5 months and Nothing has been happening, they continuously put me on hold for hours and never EVER get back at me. I am so frustrated to a point where i want to cancel this contract. Please help