Ever player gets one free name change at the very start of the game, after that name changes cost 1000 coins each. If you accidentally used your free name change to keep the randomly generated name you started with, please file a Support Ticket and an agent will be happy to assist you in setting the nickname you would prefer.
Keep in mind that there is a 14-character limit on nicknames and any names reported as offensive may be changed by customer support. If your name has been changed due to offensive content, you are responsible for any costs in changing your name to something else you choose.