This article refers to 123-reg Payment and Billing
Your PayPal arrangement needs to be cancelled directly with PayPal.
The easiest way to do this is to login in to your PayPal account online.
From the My Account tab click on Profile, then select the My Money option.
Click on Update in the My Pre-Approved Payments section.
You can now click Cancel, Cancel automatic billing, or Cancel subscription and follow the on screen instructions.
When a PayPal arrangement is cancelled your payment priority will also be updated on our systems. To view and amend your Payment Priority, login to your 123-reg Control Panel.