Nick here from Shopify.
When a store is paused, you would need to pick a plan to gain access to the admin to then be able to fully close the store. I completely understand that is not an ideal process. I can reach out to you directly about this via the email you signed up to the community to bring this straight to the team who would look into helping you with this if you like?
You can also reach out to the support team directly via live chat to do this here. Let me know.
All the best, Nick