Tell them that it says its available on their website and other stores around you are selling it because the street date was removed, also point out the street date is ONLY on the limited edition. You can even tell him to scan the game and a street date notification will not pop up. Hell even show him this thread.
If that fails ask to speak to a manager and if that even fails tell them you are going to the District Manager.
The GS I work at is cool but this is the best way to deal with the ones that wont budge.
