Poor service from Vumatel continues

I have been without Wifi for a week and Vumatel keeps making promises that the technicians are on site working on the problem since Saturday. I highly struggle to believe that this is the truth since nothing is happening and they don't even communicate with their client about any progress whatsoever. I am absolutely furious and being kept in the dark. Each call is the same with someone promising that the technicians are working on the problem. I have been patient and I do not want to take it out on the "messenger" Where are the managers and why aren't they available to talk to?