If you purchase coins and they are not reflected in the game, try closing the app, then re-launching it several minutes later to see if the coins have been added. If the purchased coins are still missing when you check again, our team at Square Enix will investigate the matter. In order to do so, please provide the information required below according to your iTunes receipt from the day the issue occurred, your Team Name as shown in the ‘Records’ menu and your ‘Query Code’ (by clicking on ‘Enquiry’) from the app.
Next, choose the ‘Fees/Points’ category on the query page, followed by ‘Fees’ and click send.
<Information required from your iTunes receipt>
・Order number:
・Date of purchase:
・Total cost of order:
・Item name:
・Unit price:
・Receipt number*：
　(*this can be found in the Subject Line of your purchase receipt email from iTunes)
If you have continue to experience problems buying coins and have made numerous purchases without intending to, we must request that you contact Apple
for further support.

http://www.apple.com/support/contact/