Hi bethcat,
Thank you for reaching out to us in our community and welcome both here and to Virgin Media, sorry to hear you have been unable to set up an Online Account due to having no account information as you haven't received a welcome letter, these can go in your spam folder, have you checked all folders?
So I can help, I will send you an invite into a private chat, once received please click on the purple envelope to accept.
Regards
Paul.