Just got gold scammed!

Hello i just wanted a heroic boost on my fresh alt, I make enough gold from professions and the price for a full clear is pretty low atm so i decided to buy one. When i got summoned in the raid a guy that i found out later was pretending to be their guild collector got our gold and then ask for a mailbox and left the raid. After that the guild asked us to pay again cuase this rogue was a ''scammer'' and we paid to the wrong guy. I am new to this, could anyone help me? i will post the guild's info and the scammers also so you are aware.
Scammer: Rogue named Bisrogue-Ragnaros
Guild: N0crinimality Realm: Silvermoon