Unfortunately, no one can answer that (including VM)! If you get lucky, it could be very soon. If you are not lucky, might not be for months.
Your query is unlikely to get attention from VM here in 'Community Natter' as they don't reply here very often. Take a look through 'Quick Start'
https://community.virginmedia.com/t5/QuickStart-set-up-and/bd-p/Setup
and, unfortunately, you'll find a whole bunch of similar topics where VM's installation processes and communication with sub-contractors have broken down completely, leading to zero communication between those involved in the installation process and long delays for the customer.