I am sorry to hear of the broadband issues. Let me get this sorted for you.
From running a fault diagnostic on the system it's stating the following; We've identified your modem has been rebooting itself for several days. Can you check that the coax cables are connected securely to the Virgin Media equipment, any splitters (standard and powered) and to the wall socket.
Yes you are correct, the router has been turned off nearly ever day since the start of last week. I can confirm that the cables are firmly connected.
The router is in modem only mode.
We started seeing intermittent issues about two weeks ago with Teams complaining of my network causing performance problems. Last week it started getting really bad with recipients complaining. I can solve it for, a while by rebooting the modem, which I have been doing every working day since last Wednesday.