Guild Messed Up On My Guild With Khoblivion

My guild name is KHOblivian and i had a problem about name change on minecraft in general my past username is Keyblader777 and now its Lance5340. Iv'e lost the ownership and it auto gave owner to my friend who doesnt play the game anymore named RedFoxGaming820 and idk what to do to gain my ownership back to me...so im stuck where i cant do any wars. do i really have to make a new guild or is there something i can solve on my own? if you need any further info reply this thread please and thanks