Property will have had cable at some point or you would not have been given a self install. Have a look outside and see if you have a brown or grey box. If yes then trace any cables from there. Other wise hang on here till someone from virgin responds.
Welcome to the community and thanks for taking the time to post on our forums.
I have been able to look into your account and book a technician visit for you. I will drop a private message over to you now to confirm the date for your install.