Bad service

I am not sure why Vumatel service have to be this bad. I have Vumatel router and fibre subscription with Afrihost. Since the Afrihost router was activated Friday, I have been having connection issues. I can't work like this. The Vuma router keeps going off. Query has been logged yester and this morning I get a mail saying Vumatel advised that the issue is resolved but I am experiencing the same issue. How does this happen? I am honestly frustrated with the whole Vumatel issue in this country. If Vumatel is not off in the areas they don't respond correctly to client issues. How hard is it to just send a technician to look at the issue. Vuma might as well come collect the router. It's of no use to me