To update your payment method for a subscription purchased on an Apple device, go to https://apps.apple.com/account/subscriptions.
Or you can follow these steps:
- From the Home Screen of your iOS device, tap the App Store icon
- Tap the account icon in the upper right corner
- Tap your name to enter your Account Settings
- Select Payment Information and update your payment method as needed
To update your account payment information on your computer, follow these steps:
- Open iTunes
- Choose Account from the menu
- Select View My Account and sign in to iTunes
- Click edit next to Payment Type to change your payment information