Split/rename the 2.4Ghz and 5Ghz bands.
Choose less congested channels for each band, disable "Smart WiFi".
Failing that you can put the hub into Modem Mode and add your own better router or mesh system.
*****
If you think my answer has helped - please provide me with a Kudos rating and mark as Helpful Answer!!
I do not work for Virgin Media - all opinions expressed are of my own and all answers are provided from my own and past experiences.
Office 365, Dynamics CRM and Cloud Computing Jedi