I'm terribly sorry you haven't received your new phone yet. I understand how frustrating this is as you're very keen to try it out and use it.
I'd like to check if the date 29/05/15 is correct? If it is then I'd definitely give our team a call as 2+ months is way too long. You can contact them on 789 from a Virgin Mobile handset or 0345 6000 789 from any other phone.