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I got a discount code for the store. I put it in the box and went to checkout and pay using paypal, but the price that shown up on paypal was not the same as the one it had said on the store, so i closed it. Now when i try to use the code it says "This coupon has been unpublished." and i can't use it, even though i didn't pay and haven't got the game. How can i get it working?