Cal here from Shopify, thanks for reaching out to us. I'm sorry to hear that you have closed your store and did not make the sales you had hoped. Were there any particular stumbling blocks that you wish to discuss here, perhaps for next time you try to take your business online?
Did you follow the steps in this guide when closing your store? If you closed the store while it was still in trial, you won't be charged for a Shopify subscription.
Did you install any apps? If you didn't uninstall those apps before their trial finished, you may be billed for those apps.
I'd be happy to take a look at this with you. What is the MyShopify URL for the store that you closed?
Hi again! I have emailed you via the account owner's email on that store. Let me know via email if you have any further queries. Thanks!