Thanks for your post and welcome to the Community Forums, Emailtodelete,
Apologies for the delayed response. Have you been able to get this account deleted since your post?
If it is an email address that is not linked to an account or if it is a secondary email, then we are able to delete it. If it is the primary email address on an account, this cannot be removed and we would advise following these steps: https://www.virginmedia.com/help/virgin-media-account-has-been-hacked
Cheers,
Corey C