With GameStop you have seven days to return it for any reason, even if you just didn't like it. They'd definitely return it for a glitch, and probably issue you a gift card.

What like.... part are you at? Did you go to the subway yet? I would suggest checking a GameFAQs walkthrough and pinpointing exactly what you're supposed to be doing at this instant.

Any chance it might be your console? D: I'd certainly hope not