It is indeed a scam it seems like. So they have nothing in stock, sends you 5x order confirmations and the refund never arrive.

So what you have to do when they cheat you: Contact your bank to make a dispute / chargeback, furthermore you can contact their domain registrar, will provide a link when I checked for that.

Just attach the email stating they refunded you and the bank will process the dispute / chargeback, and the merchant will be forced to payback + getting a 20-45usd fee as a penalty and later on they will be blocked / closed down.

Good luck. Stay away from this place if you can, but if you purchased. Just contact your bank.