To cancel your auto-renewal, the owner user must login to Ghost Admin, and navigate to the Ghost(Pro) → Billing area. From there, you can click on the red Cancel account link in the lower-left corner of the billing page to cancel the auto-renew of your Ghost(Pro) subscription.
Once your subscription is cancelled, your site and account will be deleted at the end of your billing cycle. If you need your site to be taken offline sooner, please contact support@ghost.org.
As mentioned in our terms of service, we do not offer refunds.