Thank you for contacting us. This is Joy, your iTunes Store Advisor. I would like to sincerely apologize for the delay in our reply. That being said, your patience up to this point is very much appreciated.
I’m sorry to know that you didn’t receive the In-App item you purchased. I definitely understand your situation as you’ve paid for this item in good faith and this happened. Don’t worry, I will be glad to provide information with regards to your concern.
Eakaphong, please know that applications are created and distributed by third party developers. It is recommended that you contact them directly for further insight regarding to the distribution, availability or functionality of their content as we can only provide a refund on our end.
You may contact the developer here, http://support.linegame.jp/oplg/en/help/inquiry/, to report this issue.
Because this issue persists, we recommend that you delete this app and avoid making any further in-app purchases from it until the developer confirms the issue is resolved.
TO UNINSTALL THE APP FROM YOUR DEVICE
1. Tap and hold its icon on the Home screen until the icons wiggle.
2. Tap the "X" next to icon of the app to delete it.
3. Press the Home button.
TO DELETE THE APP FROM iTUNES
1. Open iTunes and click Apps on the left.
2. Press the Delete key on your keyboard.
3. Click Delete App in the dialog that appears, then click Move to Trash.
Important: Mention of third-party websites and products is for informational purposes only and constitutes neither an endorsement nor a recommendation. Apple assumes no responsibility with regard to the selection, performance, or use of information or products found at third-party websites. Apple provides this only as a convenience to our users. Apple has not tested the information found on these sites and makes no representations regarding its accuracy or reliability. There are risks inherent in the use of any information or products found on the Internet, and Apple assumes no responsibility in this regard. Please understand that a third-party site is independent from Apple and that Apple has no control over the content on that website.
Please keep in touch by letting us know what happened as I want to ensure this issue gets resolved for you.