The GM said manualy to merge my Charaster But i cant do it

When i send a ticket to Gm i said i had a charasters in ragnaros and now i dont have them i was on a vacation for 4 months and i didnt play Wow and now i cant get my charasters back Please help me how to resolve this problem

here: https://www.warmane.com/account

or here: https://www.warmane.com/account/merge