Worst Installation Ever

Good afternoon the worst service ever, i signed up with Metrofibre and the installation team came and install my first ONT and router on the 17/09/2022 but i still cannot access the service as the internet light is not green and the ONT is flashing green , i connected via WIFI but says connected without internet, Technician came today three times to check but did not resolve the issue and just close the ticket and i have to relog a ticket they don't even indicated what the next step is I already canceled my Telkom ADSL internet and is working a lot of times from home and currently using my mobile data, this is really an inconvenience. i hope this can be resolve my order number is ***4 (0) Tel : ***, the last guy just said the problem is with the router as the test he did showed there is Fibre to the ONT Orben Sceffers