First off, thanks to reaching out to us to clarify this issue. We hate having to do these deletions, especially in edgy we're-not-so-sure cases, but they're required by law. Your profile was deleted because of this explicit statement that was made by you in chat:
All this and I've still to see my 12th birthday! :D
While I can see how that statement might have been a playful joke, laws rarely allow us to interpret the statements for anything more than face value. And at face value, that statement is a clear admission to being under 12 years old, and we were required to take action and remove all information until such a time that we could get clarifying information. I don't recommend you ever make statements online that you are underage when you're not, whether it be a joke or not, anywhere on the Internet. It is just an incredibly bad idea.
At this time, I've restored all of your posts and comments to your new profile, which will also restore any reputation from them and re-award any badges you are still eligible for over time.