If you wish to remove your payment method or amend the payment details that you use for Google Play purchases, please follow these steps:

• Open the Google Play app.

• Tap the profile icon on the top right.

• Tap Payments and subscriptions, then Payment methods and then More.

• Tap the 3-line menu button to open the side menu and then tap Payment settings.
  If asked, sign in to Google Pay.
  Under the payment method that you want to remove, simply tap Remove or Edit.

If you need further help, you may find this article from the Google Play Help Centre helpful: Support Google

If you have any additional questions, feel free to contact our Support Team.