All purchases and payments are handled by the respective platforms, Play Store for Android and App Store for iOS/iPad OS, Amazon for Amazon App Store, Microsoft for Microsoft Store and META on Facebook. Your payment method is stored in your app store account settings. Please follow the next steps depending on the store you use. 

For the App Store:

1. Open device settings -> iTunes & App Store.
 2. Tap your Apple ID email and select View Apple ID. You may be asked to log into your account.
 3. Select Payment Information. If your device is associated with Family sharing, your payment information can only be edited by the sharing organizer.
 4. Add, edit or remove the information. Tap None to remove a payment method.
 5. Tap Done.

IMPORTANT: As soon as you’ve changed your payment method/information, you may see a temporary authorization hold on your means of payment. Please note iTunes does that to make sure your new payment account is valid and active.

For Google Play:

 1. Open Play Store.
 2. Tap menu -> Account.
 3. Choose Payment methods -> More payment settings.
 4. Enter your Google Payments account if asked to do so.
 5. Tap Menu in the browser -> Payment methods.
 6. Tap Add to add a new method or Edit under the selected payment method.
 7. Apply the changes and tap Save.For the Amazon Appstore:
 1. Open Manage Your Content and Devices.
 2. Select Settings -> Edit Payment Method.
 3. Enter your changes and tap Continue.

For the Microsoft Store:
  1. From your Microsoft account Dashboard enter "Payment options"
  2. There you click on "Add new payment method" to add new purchase information
  3. Once you're sure that all information is correct, make sure to save.

     Click here to enter an official Microsoft Support Article regarding this matter. 
For Facebook/META:
  1. Click your profile picture on top right, and enter "Settings and Privacy"
  2. Click on Settings, and then click on "See more" in Accounts center on the left side of the page
  3. Click META Pay and then select Add Credit/Debit Card
  4. Please make sure that all information are correct, and then save.
For more information, please feel free to click here to open the official Facebook/META Support Article.