Please Help me i got hacked

Hai Game Master i need your help
Today 8 mai 2014
i was playing seal with my girlfriend and my brother and we were doing Beggar element Quest...
I got wisp from play rohan and say i got my free RPS...
so i open my internet and it goes to play rohan webstite.. i try to login with my id like usual to check my RPS...
after that.. my character disconnected from game....
wenn i log in again.. my charackter already in lime.. and my dragon, and bt xg+7 and YR xg+7 are not there anymore...
only 5 minutes and all of this happen,,,
i go to change my password now..
GM please help me.. i won that eq by Grabit,,and i played 4-5 hours a day and i have my GF and brother that always play everyday...
Please reply and help me
my charackter in seal Chillimonster
With Best Regard
JEFRY