If you do not want to apply a subscription for a your domain anymore, you can cancel it on the Magento backend Billing History page on Backend or on Paypal (https://www.wikihow.com/Cancel-a-PayPal-Subscription#:~:text=When%20you%20sign%20into%20PayPal,recurring%20payment%20on%20that%20screen.)
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After clicking on the Cancel button, there will be a pop-up
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After clicking on the OK button, the subscription will be canceled successfully.