You're supposed to pick it up when you pick up your copy of Lost Odyssey, but Microsoft has been bad in regards to sending enough swag for all the reserve customers for their products. If I don't have enough swag, I'll hold it for folks that asked about it and regulars, first.
Honestly, if a Store Manager is going to argue with you on noticeable disc defects and you have a non-informed staff, I'd be tempted to just shop at another location run by a competent crew. That's kind of whacky. You hear the horror stories, but it's kind of crazy considering the amount of energy that myself and several Store Managers I know put into their individual stores.