I'm Ava from Shopify, I'd like to help you out here.
I can definitely understand the frustration here, especially as you were in the middle of building your store! Can I ask how you've reached out to our support team? If you haven't seen it already, I would recommend reaching out via live chat support here. Our support team can authenticate you as the store owner via live chat, and investigate your account to resolve this for you. If a store was ever to go inactive like this, it can only be resolved by our team internally. So reaching out to our live support channels is the best way to resolve this for you!
Once you reach out there, can you let me know how you get on? Just so I can be sure this was resolved for you!
Social Care | help.shopify.com