Hi EH1960
I hope you are settling into your new home.
Virgin Media systems always create a new account for home moves. (When a customer moves the account number changes, the account number sits with the property and not the customer)
It's possible that you can't access the Connect app because it's using the email address from your old property.
Homemovers should have created a process called 'Move and Transfer' which would move over your current email address (es) to the new account and also update My Virgin Media allowing you to continue as before the home move.
If this is the case then a member for the forum team may be able to process this for you. however it may take a couple of days before they pick this up for you.