After a quick scan here, it seems apparent that this is something of an epidemic. I called 789 on Thursday (24th of November) an was told my number would be ported from O2 the next day. It's now Saturday. Outgoing calls are from my old number and can be made without issue. Calls to my old number receive an error message (number not in use). Text messages are not being sent or, as far as I can tell, received, from my old number. Just tried to call 789 again to be told there is a problem being connected so I can't even speak to someone there.
This is my business number I'm talking about here. I'm losing money. Not a good start Virgin.