MTN: Terrible service

Pathetic lack of service. I have been trying to query a high amount I am being billed for about 2 weeks. I have spent about 4 hours on the phone. I have got nowhere. They put me through to other (wrong) departments. I thought I might have got my point across last week. But then I got a message that my query was closed. Absolutely no explanation, and my actual query was not addressed. Now their systems are offline. One can only assume that they are trying to delay the process so that they can continue to overcharge me. I will never go MTN again.