MTN's total neglect for customers' needs!!!!

I have been an MTN customer for over 5 years but the service they give me stinks. I have had the worst experience with MTN's customer service. My account was sent to the legal department, without my knowledge, over a R140. I was not informed of this. I only find out when I want to upgrade my phone, as soon as I find out, I paid MTN the amount outstanding. However, my account is still with legal, days later. Despite me calling them and requesting them to remove me from their list. I do not have a phone and no one seems to want to help me. I will be cancelling my account and moving to a better network provider. Thanks!!!