FYE Music/Video Store Sold Me Pirated DVD?

I bought Fight Club from their store and when I got him I noticed that the artwork is on printer paper and that the discs bottoms are blue and say "DVD-R" on the back side. I am pretty certain this is a pirated copy cause all my other dvd's are silver on the bottom and I have blank discs that I bought and they are all blue and say dvd-r on the bottom. What should I do?! I don't know how to handle this.