[HELP] Accidentally sell yulson Voucher.

Help me, I accidentally sell my yulson voucher to npc, please help. :(
nick : Shinichi
Server : Earnests

I found you, phuckerio... I found you here. Well, it seems you've got to ask someone with a high rank, I don't know anything regarding your problem I'm sorry. Have a sit and wait, sir.
-Lien