You can cancel your Membership and Paypal subscription at anytime from your own Paypal Account Screen.

1.Log in to your account at Paypal
2.Click on ‘Profile’ near the top of the page.
3.Click ‘Recurring payments’ in the Financial Information column.
4.Click the ‘View details’ link of the relevant subscription.
5.Click 'Cancel’ near the top of the page in the Profile information section

You have now cancelled the subscription.