scammer $3000

THIS GUY SCAMMED ME. UNFORTUNATELY, THERE'S NOTHING I CAN DO NOW. I'M SURE HE HAS A PROFILE ON EPICNPC, BUT HE NEVER GAVE ME HIS PROFILE. I MADE A $375 EXCHANGE FIRST. A FEW DAYS LATER, HE CAME BACK WITH $3K USD. SOMEHOW, HE DECIDED TO REQUEST A REFUND, EVEN THOUGH I HAD ALREADY SENT HIM THE...