Zubato

Hello, I would like to know if there is any way I can change what is on my account. My nickname in the game is Zubato, I did not play long ago, when I came back to play now I was different, I only had two serves, I joined gold, but I would like my account to be on the silver server, because my friends are all there. if it is possible what will be necessary for this server exchange to occur? I'm waiting! I'm sorry if I posted in the wrong place right away.