Thanks for taking the time to contact us via the Community. It's lovely having you on board with us in the Forums. ⭐
We're sorry to hear that you are being charged for Netflix. In order for this to be added to your bill, someone would have needed to have logged into the Netflix account and updated the payment details to pay through Virgin Media. There would have been a few confirmation pages and the PIN would have also needed to be entered.
The Netflix billing isn't something we can activate from here. It's worth checking your V6 box to see if the account logged in matches the account you're also paying for through them as usually once you opt to pay through Virgin Media, the payment is then not taken separately too so if this is happening, it sounds as though you've created a new account rather than logging in to an existing account.
To cancel paying Netflix through your Virgin Media bill, you will need to log in to the Netflix account directly through them and either cancel the account or update the payment details to another method.
Keep us posted on how things go.