See this comment I have posted before. The installation process works fine for most new customers - when it doesnt it is an omnishambles
Can you connect to OR,Sky, BT etc - or a 4G/5G service - perhaps on a 30-day contract? Three and Smarty have a 30day 4G unlimited package for £20 (or less on a deal). If so, do it now and just let the VM install run its course. You will pay nothing until VM's service is installed and operational.
When it finally happens, you have 14 days in which to cancel it at no cost to yourself and keep the other service. Or, if VM is working to your satisfaction, keep it and cancel the other service (hence better if you took a 30-day contract).
See John’s excellent precis in message 18 of this threadhttps://community.virginmedia.com/t5/QuickStart-set-up-and/Multiple-Failed-Installations-zero-commun...
I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired, 1 WiFi, 1 on PA) Hub5 in modem mode with Apple Airport Extreme Router +2 Airport Express's. On 250Mbps, Talk Anytime Phone, x2 Mobile SIM only iPhones.