CanI geta moreconvincing reason because im itchen to play it

I bought Star Wars:The Force Unleashed Ultimate Sith Edition(for €30) yesterday in Smyths and the guy at the counter gave me a display case with the booklet and new game. I didn't notice it until I got home but when I did i noticed the case was cracked in the top-right corner.

I didn't open the seal so now I have a month to return it, should I?