I remember reading that at the bottom of the ticket you got from gamestop that you should have a code to input into the pre-order site. THEN an email should come with the bonus items.

Otherwise, please go to their support page and input a ticket, they aren't going to come here and respond to something that is very personal and something that they might need your person information on. Hell, it could be gamestop that is causing the backup and not SE.