You can edit your payment method in your account settings.

For the App Store:
1. Open Settings -> iTunes & App Store.
2. Tap your Apple ID email and select View Apple ID. You may be asked to log in to your account.
3. Select Manage Payments. If your device uses the Family Sharing function, your payment information can only be changed by the sharing organizer.
4. Modify or remove the information. Tap Remove to delete a payment method.
5. Tap Done.

❗ IMPORTANT NOTE: Once you’ve changed your payment method, you may see a temporary authorization hold for a small amount on your payment card (iTunes does that to make sure your new payment account is active).

For the Play Store:
1. Open the Play Store app.
2. Tap the menu icon -> Payment methods.
3. Choose More payment settings. The Google Pay website will open in your browser.
4. Tap Edit under the payment method you wish to modify.
5. Apply the changes and tap Update.

For the Amazon Appstore:
1. Open Manage Your Content and Devices.
2. Select Settings > Edit Payment Method.
3. Enter your changes and tap Continue.