My user name was changed by someone who wasn't me.

So I was logging into the server I play on to see my name had been changed from Arnak (my real name) to some random name PAEGamerC. I wasn't the one who made this change. I quickly went onto my account and updated my password, but I would really like to change my name back to Arnak asap as it is my actual name and a fairly common Armenian first name which I wouldn't want to lose.