Terrible fibre connection

We had fibre installed four weeks ago. Half an hour after the installers left our line disconnected itself for the first time. Since then we have not had a stable uninterrupted connection for more than 30 minutes at a time. Over time the problem has gotten worse. The majority of the time it disconnects every 10 minutes now. Yesterday was more like every 3 minutes. The router takes about 2 minutes each time to allow you to reconnect. So it disconnects so quickly we cant even connect to the internet. On average since the day of installation. We have been without internet for more than 8 hours per day.

We have called customer care and emailed a bunch of people. The techs trying to help called us back a bunch of times but no one can find out what the problem is. We have had techs in our house that brought new routers ( we actually have three laying here, all doing the same thing). The line has been tested by voda and frogfoot. No one can find the issue