I already brought the ticket but when i tried to change my guild name and pressed ok, there’s no response and my guild name remains the same.
Hello @LAn,
I’m sorry you’re having issues with changing your guild name.
As I understand you changed your name and nothing happens when you click on ok.
Before we escalate this lets try this -
KIndly verify integrity of game files on steam Steam Support :: Verify Integrity of Game Files
Once this is done reboot and restart your game, see if this resolves your issue.
If the issue still persists, I would advise you to kindly contact our live support using the link mentioned below, and create support ticket you can refer this forum post to them as well.
Support | Amazon Games
Thank you in advance for trying out the steps! 
See you in Arkesia! 
