I am in the same situation. Being an FF completionist, I can't resist getting store items that come with in game exclusives (many of which I would get anyway), however, I discovered too late for two items that I either entered the code incorrectly or somehow forgot to do so before the deadline (both items purchased before expiration times). One is for the Namingway minion that came with the first Encyclopedia and it really burns me to be without this. I would really like to see them make a way for these to be useable again or at least to be able to obtain in another manner.