One thing I would do if the mattress you tried at the store is still there is to photo all of the tags and display information and compare the info to the tags on the mattress you received. If the information is not EXACTLY the same then you did not receive the product you paid for and you can claim "bait and switch". There are so many differences that can be made to change the quality, feel and cost of a mattress even down to the thickness of the foam layers and top covers but those differences should be listed on the tags and information.