If a notification indicating a payment failure pops up and the payment cannot be processed normally,
please quit the game and restart.
If the issue persists,
please follow the steps below.

● Google Play Store (Android OS)
1. After searching for [Google Customer Service] in the Google search bar, access the customer service page
2. At the [How can we help you?] bar, search for “Problems with in-app purchases” in the search bar and press “Read more”

● Apple App Store (iOS)
1. Go to the Apple customer service website
2. Under [Search for a topic], search for “If you can't find or use your in-app purchases” in the search bar and follow the instructions