Open the Google Play Store app
Tap your profile icon
Tap Payments & subscriptions
Tap Payment methods
Tap More payment settings
Sign in if prompted
Find the payment method you want to remove
Tap Remove or Remove payment method
Confirm the removal
If needed, open pay.google.com in a browser
Sign in to your Google Account
Go to Payment methods
Remove the saved card, bank account, or other payment details
Make sure no active subscriptions or unpaid balances are using that payment method