Share your experience!
I'm sorry to hear about your issue but it's highly unlikely, you have to contact your Local support as this is a user based forum.
There are posts, not only on this forum but other brands, on users claiming that a screen cracked on it's own, it's not true, perhaps you sat on it, perhaps you bumped with something while the phone was in your pocket, etc, you can post a picture of the phone, perhaps we can find the point of impact.