In this knowledgebase guide, you will see how to cancel your PayPal subscription after your cancel the service or stop using the subscribed Minecraft server hosting package.
Please note that this has to be done from your end once you inform us regarding the cancellation. And this must be done by logging in to your PayPal account.
The steps as follow.
Step 1 - Log into your PayPal account which you used tp pay and subscribed for the Minecraft server hosting package from SeekaHost.
Step 2 - Click Profile (the gear icon) on the top right corner of the page.
Step 3 - Click Pre-approved payments under "Payment settings".
Step 4 - Select the merchant whose agreement you want to cancel, and click Cancel.
Step 5 - Follow the instructions to cancel the agreement.
Source - PayPal.com