Hub 3 needing reboot frequently

I have the M500 broadband package and a Hub 3 router which I understand is currently being replaced by Virgin Media with the Hub 5 router. Apparently speeds of 500mb are at the limit of this router.

I think my router is now struggling as I have to reboot it every few days as it seems to lose its connection with my tv box and my Firestick.

Rather than wait for "my turn" for an upgrade, how do I get hold of a new Hub 5 asap?

I have tried the "web chat" but can't get to speak to a real person and I don't want to spend ages on a call.

Any help will be appreciated.