Hey, I've made a dumb little accident of buying the game twice, mostly because it said "error", but in reality the payment was sent and the game received so I assumed it didn't do it and bought it again.

Immediately after finding that out I made a support ticket for a refund of one of the purchases, with no response.

What should I do?

When did you contact support? They are a pretty busy company so it may take a while.

Two days ago. Well, hopefully they can refund it.

you can return games through steam if you haven't played them too much. 100% allowed and legal

I bought it on this website, using PayPal. I used one of the copies on Steam, and left the other one unused so I can get a refund for real money, not steam money.

Paypal should be able to resolve that for you, and probably quicker than BE