bubble subscription tickets are processed as regular payments through the app store (iOS App Store or Google Play Store).
If there is a problem with the payment method or account registered in the app store, payment may not be processed. For further inquiries, please refer to Help in the app store or contact the customer center of the app store.
[Google Play Store] https://support.google.com/googleplay
[iOS App Store] https://support.apple.com/choose-country-region