Once you've set a username in Clash of Clans and played for a while, you might later change your mind about which name you picked and decide you want a new one.
Unfortunately, changing your name on Clash of Clans can only be done in one way it seems:
Contact the clash of clans support team
If you click on the link above, that should open an email to the support team.
You can also get info about other Clash of Clan problems (although name changing is not mentioned) in the support pages: https://gamesupport.supercell.net/hc/en-us/categories/7122-Clash-of-Clans
These are hosted on the site of parent company "Supercell".
As well as contacting the team via email as mentioned above, you can also write a letter to the Clash of Clans team here:
Itämerenkatu 11-13
00180 Helsinki
Finland
