MTN Consistent Billing Issues

Let me keep this short. I have a persistent problem with MTN sending messages and cutting a line that I pay for every month. I have spoken to numerous supposed "service champions" about this issue and yet no one resolves the issue. Last month the line was disconnected without notice. I made 2 payments to get the line working and at that stage, I received a statement for MTN indicating the next debit order with only go through in August. So MTN put the debit order through again which should not have been done because the next payment is due in August. So again if this payment isn't made they will more than likely disconnect the line again. And of course, when you try and speak to a supervisor they are always on the other line. Someone at MTN with some form of competency needs to resolve my issue as this happens every quarter for the last couple of years...and yet I still have the same issue.