You can change your payment method in the settings of the store from which you have downloaded the game

In Google Play Store:

• Open the Google Play Store app.
• Tap the Menu icon on the left side of the screen and choose Payment Methods.
• Go to More Payment settings. The Google Pay website will open in your browser.
• Under the chosen payment method, click on Edit.
• Make the necessary changes and click on Update.

In Apple App Store:

• Open Settings and tap your name.
• Tap Payment & Shipping. You may be asked to sign in with your Apple ID.
• To add a payment method, tap Add payment method.
• To update a payment method, choose the payment method, then edit your information
• To remove a payment method, tap Edit, then tap Delete.

In Amazon App Store:

• Open Manage Your Content and Devices.
• Select Settings -> Edit Payment Method.
• Enter your changes and tap Continue.