Guild Name Change

[kazuma]

so i just started playing this game previous week and bought a guild with from someone i want to change the name and it wont let me pops up with this, is there any way to by pass that or get assistance for my change to happen so i can rename the guild.https://cdn.discordapp.com/attachments/635801470658281492/636765313148649508/unknown.png

i even bought the item with VC https://cdn.discordapp.com/attachments/635801470658281492/636765438180720650/unknown.png