You can cancel a payment that has been scheduled as long as it has not been processed yet.
To cancel a scheduled payment:
Under the Payments menu, go to History tab.
Scroll down and click on the option to see payments that are still processing.
Locate and click on the payment you'd like to cancel.
On the Payment details page, click the 'Cancel payment' button on the right side of the payment.
An alert will appear. Click 'Yes, cancel payment' to confirm.
The steps above apply for both one-time and recurring payments.
To learn more about canceling a recurring payment that has not been scheduled yet, please see our article on How to edit recurring payments.