Best Buy Return Policy on my PS3 game?

I bought a game for my PS3 and bought the extra 5 dollar one year warranty for it. I don't like the game as I thought I would and would like to return it. They said they can replace it or give me store credit if it stops working, but I was wondering if I can get store credit for not liking it since I it is under the one year warranty. Please let me know and Thank you in advance.