Mtn unwilling to solve an issue arising from their own incompetence and lack of professionalism

Been with mtn for the last 4 years. It has been a horrible experience since day 1. Their customer service is non existent. I have spent over an hour on the phone with them,trying to cancel my contract. I was transferred to 4 different departments, with no results. One department tells me that mtn owes me more than what the cancellation fee is. Another department tells me that the owed amount has already been credited to me. Customer care tells me that I am on a month to month sim contract, which is indeed what has been sold to me. This has already been confirmed via recorded conversation a month ago. Now their billing dept tells me that it has been captured as a 24month contract. All the while they leave it up to me as the customer to try and figure out what is going on with my account, jumping back and forth between departments. None of them taking any responsibility to get the problem sorted out, a problem arising from their own incompetence! Their departments do not know how to communicate. The fact that the contract specifics are captured completely wrong indicates that their staff has not been trained properly. Thus they cannot deliver satisfactory customer service. I have been promised that a supervisor will contact me with regards to this issue many times. As yet, no one has made contact with me. Their 'supervisors' are never available, always 'in a meeting'. All I am trying to do is get rid of them. I am at the point of taking this up with the ombudsman,as mtn has displayed neither professionalism, nor willingness to assist a paying customer. Stay away from them!