Each automatic payment can be canceled at any time via the Automatic Payments section > click on the payment > "Cancel automatic payment" button.

You can disable the Auto Renewal option for all payments by turning off the Auto Clear Balance via PayPal option via the Account Panel Dashboard > "Cancel auto clear" button. If you decide to enable Auto Renewal again in the future, you will have to enable the "Auto Clear Balance via PayPal" option again, and then enable Auto Renewal for each service you want to have renewed automatically.