MTN coverage poor to non-existent

For many months I have been reporting MTN's poor service/lack of service to their call centres. The whole town of Dullstroom suffers from intermittent voice and/or data coverage. Yesterday we had no service for the entire day, and on calling their coverage help desk several times all I had was a prerecorded message saying their office hours are 8 to 5 Monday to Friday - it was Friday during office hours. The service has constantly deteriorated over the past two years, and I believe the tower needs an upgrade. I have reported the issues often, and nothing has been done. I have also taken up the issue with Icasa. The most common response is a call centre operator telling me to restart my phone, we have 4 on one contract and many others in the area have the same issues. The least I expect from MTN is that they terminate our contracts for porting to another service provider.