I just got scammed

Hello guys I adress to you in hope maybe i can get an answer.
Today I wanted to sell an item on global chat I got contacted by someone, the item cost 13500g,he asked me if is alright to buy for 13400,I agreed and traded with him in the last second he erased one 0 and I got only 1340g for that item,now he is logging off and I dont know what to do,I opened up a ticket hopping an admin can do something,I farmed a lot of that pair of bladeborn leggins and it just ruined my day. Is there a way I can get my item back? or at least the worth of gold we agree upon?

I'm assuming you didn't record or screenshot the trade. If that's the case, there's nothing you can do. He'd get banned if you had proof but your item is lost for good.