Politeness doesn't make up for bad customer support.

[Elkanah]

Oh, for sure, I know it's not Square Enix's current policy, I was simply trying to state that other retail companies are doing it. I realize the chances of them actually changing the policy based on a thread is low, but you never know. I think allowing price adjustments would be more consumer friendly, and it is obvious that other companies do it. However, for the time being the OP is out of luck.

Physical items aren't also the same as digital items too, to keep in mind. BestBuy, Walmart, among most retailers don't have a digital refund available for (say) a Xbox live or Playstation subscription card. Even gamestop. Once those are purchased and processed for coding (having worked at Gamestop in the past), they are non refundable. Which would be considered digital content, since they cannot be reversed.

I do recall a time where a friend made an accidental purchase at Xbox and their customer support refunded it as a one time courtesy for his account, on a game he accidentally bought, but the turn around time for the license to be removed from his account for said game would take up to 2-4 weeks time. Not sure if this would also apply to dlc's, but it's the only one I actually recall or remember happening at the time of the purchase.

Now, while this is in no way related to the topic, we don't know how the licenses applied for said items also apply to ones account. If it was easily removable and re-purchasable in a 24hr period, cool, but that may also not be the case. While this is Xbox and not Sony or Squeenix, I'm applying a possible logical reasoning lol.