Yes you can return, with the receipt but only for a replacement of the same product, you will not get a refund from them with a sterling receipt. I did this with a game for a wii that would not load properly, not a problem at all.
But a little trick for you if you did want to return it to buy a different camera or something else. Once you get the replacement you get issued with another receipt, it wont say you paid for it but it comes up that it was a replacement but it says nothing about were you got it from originally, so just go back another day or to a different store and get your refund under the 16 day money back agreement.
As it turned out after 3 different replacements of that game and it still wouldn't work, turned out to be a problem with the wii even though every other game would load ( still haven't figured that one out ) but this game would not load on my wii but it would on others so no point in me keeping it. So still with the replacement receipt for the 3rd time i went back the next day, and got my money back. Didn't actually think i stood a chance of getting a refund but no one questioned it at all...happy days!!