Continue the threat..
You sent him some money which means you have his contact info that he'd likely do anything to keep private.
His name, address, phone number are all public info.
He has technically stolen from you now and you can legally post his contact info as an attempt to get your money back from him.
And whatever ways people decide to torture him are not your problem
So Clickbuster you'd be better off paying the O.P back or i'm sending escorts to your mom's bassment.