Unknown Reason For Ban?

Hi, this isn’t really a bug, but I tried to log on today to find I was BANNED for griefing or stealing. I had taken some stuff from a friend on a false alarm of him permanently quitting the server, but I gave it all back. it’s only for 6 days, but I still want to know what happened! I was just banned overnight for who knows what. This is a form of ban appeal, and I wish to be unbanned and spoken to.