If you need to update your payment details, you can do so through the platform where you made your purchase (Google Play, Apple, or Amazon). Follow the instructions for your respective platform below:

Google Play: #

To update your payment information on Google Play, follow these steps:

1. Open the Google Play Store app on your Android device (phone or tablet).
2. Tap on the Menu icon (three horizontal lines).
3. Select Payment methods.
4. Tap on More payment settings.
5. Select the payment method you want to edit and tap Edit.
6. Enter your updated payment details and tap Update.

For further guidance, you can visit the official Google Play Help Center:
Google Play Payment Methods Help

Apple (iTunes & App Store): #

To change your payment information on Apple devices:

1. Open Settings on your iPhone, iPad, or iPod touch.
2. Tap on your name at the top of the screen.
3. Select iTunes & App Store.
4. Tap your Apple ID and then choose View Apple ID.
5. Tap Manage Payments.
6. Here, you can add, update, reorder, or remove your payment methods.

For more information, visit Apple’s support page:
Apple Payment Methods Support

Amazon: #

To update your payment information on Amazon:

1. Go to Manage Your Content and Devices on Amazon’s website.
2. Select Preferences from the menu.
3. Click on Digital Payment Settings.
4. Under Edit Payment Method, select a different payment method or add a new one.
5. Click Continue to save your changes.

For more detailed instructions, visit Amazon’s support:
Amazon Payment Methods Help