C Fibre Problems

Our WiFi went down a week ago. Two calls to the tech department led to lengthy cellphone assistance but they could not fix the problem. We have been requesting that they send a technician to us to fix what we believe is a router problem because we can access the Internet on one laptop but there is no WiFi. This affects phones, other laptops and iPad. The technicians changed details on the other laptop and now we can't log in to it. No amount of calls and emails have led to anything. They don't come back to us unless we phone in, and if we do, they want to do the same phone support which hasn't helped. I don't even want to give the a single star rating