Did you follow the One Touch Switch process with VM by following the process described below?
https://www.virginmedia.com/broadband/switch
It’s quick and easy to switch broadband providers and move to Virgin Media. There’s no need to tell your current provider or give them 30 days’ notice, and you can switch at any time to one of our best broadband deals though if you do so before your minimum term is up, you might be charged fees.
Simply choose your prefered bundle across all our broadband, tv and phone deals. Once chosen, you can start your broadband switch, firstly just check if you're eligible using our postcode checker. Then you’ll be asked to give us some details, including your current broadband provider, surname, address, account number and the services you want to switch. We’ll use these to find your account with your current provider. If we can’t do this, you’ll need to contact your current provider to check your details or disconnect from them yourself.
Your current provider will send you some important info, including details of any early disconnection fees, which you should read before you agree to switch broadband providers.
Did BT also provide you with a TV service? If so please see below for further info which also details who is responsible if a broadband and landline only switch goes wrong.
ManageAccountCable/switching-from-another provider using OTS