You can cancel a PayPal subscription at any time from your PayPal account using the directions provided here:
https://www.paypal.com/us/selfhelp/article/How-do-I-cancel-an-automatic-payment-I-have-with-a-merchant-FAQ2058  

Alternatively, we can cancel a subscription for you so long as it is associated with a CubedHost service. We only need you to specify which subscription you need canceled, if you have more than one.

If you have submitted a cancellation request and a PayPal subscription was associated with the service, it will be automatically canceled.

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