The worst service i have ever experienced EVER!!!

I have had an MTN contract for more than 10 year and i have been trying to cancel my contract for the last two and a half months. I've probably spent around 10-12 hours on the phone trying to get through in the last 2 and a half months and even went to a branch and spend more than an hour and a half with a guy and he couldn't even get through, because you CANT cancel it at a MTN branch, you HaVE TO PHONE which doesnt work. Everytime i call it takes 50 min to get through and then when i finally get through they transfer me to the cancellation department and my call gets cut off. They cut off my outgoing calls because i \havent paid"twice already I had to resort to cancelling my debit order at my bank because i cant seem to get through. When i finally got through 2 weeks ago they told me they had problems with the cancellation department"