Issues holding connectivity to devices

You have had 3 Hubs and the connection problems still exist and VM  say there are no issues on your connection?

On the face of it then, that suggests you are just getting poor wifi at your location.  To prove check/that...  are your issues only evident on wifi connections or do you see them at the same times on devices connected on ethernet cables? If you don't know, can you check on one to help diagnose whether it is just a wifi issue or it could be network connection/Hub related?
What Hub model is it? What are the various Hub lights showing/doing when this happens if a Hub3 is the base light a steady white(ish) or flashing green?

If it is wifi only see this old post...

On a Hub3/4/5, you could first try separating the SSID's of the 2.4 and 5 GHz wifi bands by renaming them in the settings At the same time switch off "channel optimisation/Smart wifi” and “ apply and save the settings. All wifi devices will now need reconnecting to the best SSID at each location. Also use a wifi scanning App or Apple Airport Utility) to find the best wifi channels to use (just select and use channels 1,6,11 on 2.4GHz) - this often helps Hub users get better wifi performance - so its worth trying - but its still no substitute for getting better kit 🙂

To address the wifi issues, VM now supply “wifi Pods” (no longer doing cheap and cheerless and poor value “boosters”). However, their Pods are only free to customers on the 1GB, Volt (or old Ultimate Oomph) packages - is that you? If so they are worth trying - they should work for you. VM Wifi is now “guaranteed” to 30 Mbps/room it’s now called… Wifi Max
See if anything in here helps….

https://www.virginmedia.com/wifi-max

You call 0800 064 3850 to order the first one after scanning for blackspots using the connect App.- or just wait here for a VM person to respond in a day or two and they will sort the first one for you. If you do call dont get fobbed off by the offshore CS agents' saying you aren’t eligible - if you are - it is clearly stated on the webpage.

If not free to you… you will be charged £8/month for up to 3 pods (note - BT charge £10/mo for their whole home wifi solution). It’s a simple solution and should work for you. However, you would soon pay off that cost by buying your own wireless solution that will be yours to own and use forever, although the VM Pods should be a simpler option.

If you do want to invest in better equipment, you would need to get either a… (1) Mesh System, (2) Wireless router, (3) Wireless access point(s), (4) a pair of good quality Wifi Powerline Adaptors, or a combination of (2&3).

£40-100 (that’s ~4->12 months of Max Pod rental) should sort it for most customers with an average property and usage. Spend more for additional advanced“features” - if required.

See the post from “newapollo” in this thread for a guide to scanning and ordering Pods….
https://community.virginmedia.com/t5/Networking-and-WiFi/Impossible-to-request-a-POD-via-VM-Connect/td-p/5493273