Longer coaxial cable needed, can Virgin supply one?

I need to move my hub 3 router from behind the tv to try to improve the WiFi signal. Unfortunately this is where the engineer put it when it was installed but with a very short 1 metre cable from the wall box. I just need to move it about 3 metres away from where it is located now and raise it up on a shelf. 
I see that other people have asked this question before and have been helped by the moderators so I wonder, could a moderator reply to me here? Otherwise I will try calling customer services. Thanks.