MTN account query unresolved after 4 months

I don't think MTN deserves even the 1 star. I have been waiting for 4 months to get an account query sorted out. I eventually reverted to ICASA and the response from MTN was so pathetic. They did not look into their own accounting problem at all, just made it out as if I am at fault. I was sent an email to say that the additional payment taken in February will taken off against the April debit order and I am still waiting. I insist on an answer from MTN to resolve this matter.