How do I create my guild

I am an officer for the guild “High Society” on Dentarg/Whisperwind. We are trying to get it setup so we can upload our raids for guildies to view, but I cannot add our guild. When I try it tells me there is already a guild by that name on Dentarg.

I can’t find one when I search warcraftlogs, so I’m unsure what’s going on. I just need to be able to get this setup, preferably with guildies able to auto join when they link their account.

Server: Dentarg
Faction: Horde
Guild: High Society
My character: Phexor
GM: Scawmf

Thanks for any and all help/advice