Billing is handled through Shopify, and you will be billed monthly by Shopify.
Simply uninstall the app from your store, and your subscription will be cancelled.
You keep them! They stay with your store, served up as pure HTML. You would want to reinstall Shogun to resume editing your pages, but we don't take them away if you're not using the software.
We offer software, not services, but if you need someone to work on your pages, we can refer you to one of our partners. Please email email@example.com and we'll point you in the right direction.