Sometimes deleting some recordings if you are still able to do that and then trying the upgrade again has worked for some users, but usually you will need Virgin to be involved as the problem could be account related. Have you called Virgin to report a problem.
If you haven't then you need to call Virgin on 150 from a Virgin phone, mobile or landline, or 0345 454 1111 from any other phone to report a fault, then ignore all the options offered and you should then be placed into a queue to speak to someone.