If your subscription was purchased through Google Play, you can change your payment method directly from your account whenever you need to. To do this:
- Open the Google Play Store app on your Android device.
- Tap your profile icon in the top right.
- Go to Payments & Subscriptions → Payment Methods.
- Tap More Payment Settings to open your Google Pay account.
- Add a new payment method or edit an existing one.
Your updated payment method should now apply to future renewals.
If you have any problems changing your payment method, please contact Google directly.