If it is your primary address it cannot be deleted.
If the email addresses are secondary accounts on your primary Virgin Media account then you should be able to delete them yourself. Sign into My Virgin Media with your primary account details and the go to My Profile > Manage Accounts. Click on View/Change next to the address concerned and the hit the red delete this account button on the next page.
If the addresses are not linked to your Primary account then the VM staff should be able to delete them.
_________________________________________________________ Graham I am a VM customer. There are no guarantees that my advice will work.
As a Very Insightful Person, I'm here to share my knowledge. I don't work for Virgin Media.