Have been a moth set up and already the unreliability of Wi-Fi is awful at least 5-6 times a day it goes down for a few minutes then starts again then goes down again constantly for about 15 minutes it’s so poor and the Wi-Fi hardly reaches upstairs very disappointed
It might be an idea to invest in a 3rd party Wi-Fi router/mesh as the ISP supplied one isn't reliable. You will have to switch your Hub to modem mode and plug in the 3rd party equipment. The setup should be straightforward.
If you did wish to consider your own router then you can put the Hub into Modem mode by using the steps here. Whilst you will only be able to use the ethernet slot 1 on the Hub for the router, any ethernet devices can be plugged in to the router if that's something you wanted to do.
This isn't exclusive to Virgin Media alone, it's a known fact that most ISP supplied hubs/routers have an inferior Wi-Fi range. I had Wi-Fi issues for a long time and once I brought a 3rd party Wi-Fi router all my Wi-Fi issues disappeared.