Firstly I'd like to welcome you to the forums, also to Virgin Media. May I say that I'm really sorry to hear that the phone line isn't working for you, this is not the great start that we'd like to see.
I've done some testing on the line, and can see no reason for your loss of service, so I'd have to ask if you've been able to try another phone on the line, or try your phone on a known working line, just to eliminate the phone from being at fault. If you're able to confirm that this has been tried then the next step would be to arrange a technician to call out and investigate further.
I've sent you a private message in order to get things moving with this, please look to the top right of this page where you'll find a purple envelope icon, click on this and you'll see my message.