Major Connection Issues Hub 5x

My VM connection completely dropped off on Monday 24th around 5pm. It was very intermittent since, coming on and off, tried shutting the hub down and restarting. I'm on a Hub 5x the XGSPON line.

Resetting to factory settings (which would temporarily restore service at a decent speed only to drop to being poor soon after). Initially in my VM app it showed they could see a fault in the area and that we could book an engineer. Later on this disappeared, saying no faults in the area. We tried calling VM, which was futile as they constantly drop the call after a robot message.

I left it overnight, to Tuesday 25th. The connection is intermittent, or running very slow anyway. Plugging anything into the ethernet port, my houses switch, doesn't work, none of the device wired throughout the house work. I tried through a unfi UCG gateway, which shows 100% packet loss. But connecting to the VM hubs wifi, gives an intermittent though poor speed connection. I contacted VM in the evening and get through to someone, who runs me through the usual tests, and says they can't see an issue on the line after checking with level 2 support, annoyingly, running samknows, it was apparently showing full speed to the hub and to my mobile....yet it was struggling to load a basic Google search. 

But now day 3, 26th, same problem. Still a poor connection, nothing connected to the hub via wire works, e.g. my network switch and any devices wired to it dont seem to work when i try via cable, trying the UCG gateway sends signal to a wireless AP, which sometimes connects and sometimes doesn't, or connects without Internet or very poor speeds.

I'm not sure what the issue, and VM seem useless. Another guy on the phone prior had said it would resolve by yesterday evening as they were aware of issues, which was clearly not true just to get us off the phone. The guy I had spoke to from the technical team said I was the first person he'd spoke to on the day about having intermittent or poor connection issues.

Advice on what it could be, whether hub, connection or what else to get would be appreciated.

Observations

Hub light has stayed white, not changed to anything else. Even when reset, it stayed white. 

Hub also is in normal router mode, no changes there.

1. Can only get some level of service when connected to VM hub wifi, though poor speeds
2. Ethernet Wired devices, like connecting a switch to it, does not work, and also seems to cause connection issues for the devices connected to the hub on wifi
3. Unifi Gateway when connected, shows 100% packet loss from the Hub,
4. SamKnows tests apparently show normal speeds to the hub and to my mobile, but it cant load a google page sometimes....
5. Other wired devices I have tried, at times give an error "Error obtaining IP" or something similar
6. Resetting the hub to factory settings, briefly kicks things to working sometimes, not everything, and then quickly diminishes to poor service again.
7. Even when connected to the VM hub now, as long as the connection is stable, it shows I am getting half my usual speed on tests, but is behaving way slower, e.g. could be showing 60-70mbps, bit still struggling to buffer 1080p youtube videos at times etc.

Things tried:

1. Restarting Hub
2. Resetting to factory settings
3. Plugging devices on the ethernet ports, the ports work, but devices like those through a switch get no internet, or give "connected without internet" error.
4. Called VM, they had me do all the same, also reset things from their end.

I hear the Hub 5 had some sort of issues with DHCP, or devices being assigned IPs, could this be something similar?

Thank you.