useless once again

The useless installation team just installed a new line, it didnt seem like they knew what they were doing. I hold on the line once again for an hour and a half, they tell me everything is now ok. Obviously they were wrong. So what do I do, everyone keeps putting me through to a different department. I have already cancelled in the passed with telkom. Looks like the service is still as bad as it was 3 years ago, if not worse because no one knows whats wrong. How long is the training these days, 1 or 2 days maybe. Is this why telkom is so useless, there is not one department that can help competently