stuck between relms

accidentaly switched to warsong and have no people there and now i cant switch back. please help

On your character screen in the character list, even if empty, there should be a button at the top end with "change realm" written on it. Its easy to overlook i guess.

open your WTF Folder > Config.wtf , open this file.

You will find a line like " Set Realm Warsong".
Delete that line