https://support.zon.tools/1432-knowledge-base/3218-user-interface/12233-cancel-subscription

To cancel your Zon Tools subscription

1. Login on zon.tools with your amazon sign in.
2. (add link to Login KBA)
3. Go to My account.
4. Choose which subscription you want to cancel, and click Edit.
5. Click Cancel Subscription.
6. The message: Your subscription has been cancelled appears.