Exactly the same here. Box suddenly did an update last week as has been stuck on rebooting since then. We have been away for a week, box off, and still the same now. Cannot get in touch via phone and two SMS messages had gone unanswered. I'm pretty sure the problem is terminal and need a replacement.
That's all very well but I never get through to even ringing to a real person. It goes around various options but never "connection to a member of our team" or it just cuts me off! I have the older Tivo (3-recordings) and a separate internet router.
PS - the first SMS was sent on the 22nd of October.
Just hung on for an hour listening to crappy music then been cut off! Is anyone from virgin media reading these posts. My box had been out for two weeks now and no response at all - can't get through on the phone and no reply from SMS either!