How to unlink a bank card?

Go to Settings > Account center > Payment and purchases > Bank cards, touch the bank card you want to unlink, then go to Card details > ⋮ > Remove card. Enter your payment password to unlink the bank card. If this bank card is used for a subscription renewal plan, you need to cancel the subscription before you can unbind the bank card. (Payment and purchases > Subscriptions/Password-free payments and touch the service for which you need to cancel subscriptions.)