Just stop the automatic payment !
Paypal recurring payments allow seller to automatically renew the subscription payment on the expiry date. In other words, if you bought the subscription using Paypal, your subscription will be automatically renewed and your debit/credit card will be charged at the time the billing cycle is triggered. This process continues until you cancel the service.
To stop recurring billing charges:
1) Login to your Paypal Account.
2) Put your mouse over the “History” and click “Basic Search” as shown below.
or you can set a filter: More filters > Subscriptions and Agreements > Subscriptions as shown below
You’ll get a list of all your subscriptions and their status.
4) Click “Details” or the name of subscription you wish to cancel.
5) At the Subscription page, Click “Cancel Subscription”.
6) On the next page, you will be asked to confirm the cancellation. Click the “Cancel Subscription” button to complete the cancellation.
7) You are done!