In-App Purchase Pending for days

So I recently bought some in-game items for $10, and when I check in-game the items were not received. I looked in app store and saw that my balance had been deducted to the amount I used, and when I went to purchase history, it said ‘pending.’ A day later and the purchase is still pending with my balance lower and my items not in-game yet. I talked to some of the moderators of the game and they said that it was definitely a problem with the app store as it says ‘pending’ and it still does. What can I do to get my purchase to go through? I found it odd since purchases previous to this one processed right away.