Scammed for 70M bank by "Aroyo"

A few hours ago I posted a thread looking for a quester to do a couple quests for me. The quests were
Zogre Flesh Eaters
Rum Deal
Cabin Fever
I added him on skype and we agreed on a payment. Paid him 4.8M to do the 3 quests for me. Have screenshots of him saying "4.8M me" and the rest of our Skype conversation. He then mentions out of the blue "his worker" is doing the quests. Without previously having any notice of his "worker" having access to my account I realized I was screwed and this would be his excuse to try and maintain his Sythe account and status.
Although i'm not sure how to post screenshots onto this thread I can easily send them anywhere need be from my phone. He also lies and says "cabin fever done" before any other quests were completed. Not knowing that Rum Deal and Zogre Flesh Eaters are pre-reqs for Cabin Fever. What's the next step in getting this guy banned? Thanks for the read

The scammer - Aroyo