Cash products are sold through the app stores (Google/Apple)
and are processed through various payment methods. Therefore, there are various causes for payment failure.
If you are having difficulty making a payment, please check the following to resolve the issue.
■ How to Resolve Payment Failure Error
1. The error may be caused by the network environment you're in.
Please exit and re-launch the game in an optimal network environment and see if that helps.
2. It may be a problem with your app store account settings.
You can get help by contacting the store's customer service center.
☞ Go to <Google Pay Customer Support>
3. If it's a payment method error, then you can contact the support center for your card or telecom carrier for assistance.