Halloween Event 2014 Problem !

Hello Everyone,

First time posting in this forum and i'm having a problem with the halloween event, hope you guys have a solution for my problem, here it goes:

-To finish the quest i have to speak with the "Packleader" at "The Realm of the Unholy Ghost".
-I accidentally left the place before talking to him.
-I can't go back now.
-Can't get my EXP and Headgear.

What should i do ?

Thanks in advance

JHGBranco