Guild name is not changed

Game : WOW
Charactor : 쑥쑥돌이 on 아즈샤라 (Korea server)

Last Guild : 가는 곳마다 헬팟이면 구멍은 너
Current Guild : 우유

I never play WOW at ‘Legion’ in Guild “가는 곳마다 헬팟이면 구멍은 너”. But my all logs is in this guild.
I want to change my guild name. Please change my guild. And change my record’s guild possible.