Cal here from Shopify, thanks for reaching out to us. How are you today?
I'd be happy to investigate this invoice. Have you canceled your store completely? In order for me to look into a potential refund for you, I'll need you to cancel your store first.
We wouldn't be able to close the account in full for you here, however, you should be able to close the account as shown in the following steps below:
1. Log in to the admin section of your store.
2. Click on Settings.
3. Next, click Plan and Permissions.
4. From there, Scroll down to the bottom of the page and click "Close my Store".
Once the store is canceled, please share the MyShopify URL of the store with me here, and I'll look into that refund for you.