Theres probably a few ways to fix it. I would probably heat it up with hot running water & try & push it back. Then brace the inside with some wire or a paperclip straightened out. If it snaps while bending, you will need to glue it back together & reinforce.
That's what I would try first thing. Watch the areas where the plastic shows stress, the white areas, they will only bend so many times, then they will part, stressed on not.