Continuous Faults on ADSL line

I have been with Telkom ADSL since June and every month I am reporting faults which is costing me a lot of money as I will be offline. The technicians always come and \restore"service only for it to go down again. The call centre supervisors always promise to call back with feedback but none do. Please remove your fixed line monopoly if you cannot supply a good service. The nature of my work requires a stable and fast connection"