A payment was made even though it was not the payment date (renewal date) of the subscription ticket

bubble subscription tickets are processed as regular payments through the Google Play Store. 
Depending on the app store policy, advance payments (provisional payments) may be made from 24 hours before the regular payment date, and even if a provisional payment is made, the amount paid will be automatically refunded if you cancel your subscription before the regular payment date. 

In addition, the payment date (renewal date) can be checked through each app store as previously notified in the payment notices when purchasing products within the DearU bubble service.
For payment-related inquiries, please refer to Help in the app store and contact the customer center of the app store.
[Google Play Store] https://support.google.com/googleplay