Incompetence

Netstar gave me the worst service ever. I have been with them since 2013 and the service was good, all of a sudden everything changed. They have stopped debiting my account and the arrears have accumulated, I then called them and spoke to one of their consultants she told me that the matter has been handed over to the legal department and that they will call me as soon as they get the story. I have waited for 2 months and nothing happened I have never received any call from them. I sent a series of emails trying to remind them unfortunately no one is interested in servicing their customers. I'am afraid because I might be blacklisted because of their incompetence. Please help me out!!!!!!!!!!