well i didnt as well. i heard something about the game asks you if it was a preorder or something. You are supposed to get your pre order costumes as well as the free vita version of the game.
i have the exact same problem, i went on to my game and i see the costumes there, but for some reason they are locked, and there is no code in my email recipt. I also preoardered it from the psn store.
someone please help!!