there have been many posts on this issue.
Take a look at this thread: technical glitch with new mobile phone order
You could try giving Virgin mobile customer services a call on 789 from a Virgin mobile if you already have one.
Or 0345 6000 789 from any other phone and see if they can shed any light on your own application.
If you want to say thanks > click 'Kudos'.Answered your question? > click 'Mark as Helpful Answer' also.