How to regain control of guild

Hi I am Kosfwc an alliance warrior on Westfall. My guild has been uploading logs but unable to add them to our guild ranking. If you could kindly advise us on what our guild leader must do to gain control over the guild. We have tried creating one but it says it already exists for our realm.
Guild: Invincible
Server: Westfall
Guild Leader: Brull
Game: Wow Classic

Send mail to with this information to get a ticket created. Thanks.