To cancel your recurring donation, select your last contribution in PayPal and go to “Manage payments for …,” or go to the Payments tab on your PayPal Settings page. Recurring donations cannot be edited. If you wish to change your recurring donation, you must first cancel it and then set up a new one.
To change the credit card used in a donation, you will need to alter the PayPal transaction details. Please refer to PayPal help for more information about this, and contact PayPal support for assistance.