Poor customer service, phone service suspended even after payment was made

I paid what I can afford on my MTN account, after receiving a mail that they will hand me over. I requested assistance, whereby I was told they can help me but no one bothered calling me to make arrangements. I have sent and email which is not being responded to, and when a response is forthcoming, it is only because I follow up on why I have not received a response. My phone was switched on again, but then cut off after, because MTN decided I did not abide by my commitment. The money has been paid, yet I do not have phone service because it was cut again. Rest assured, I will not be doing business with MTN again once my contract runs out.