Hello @SynnY, if your friend was banned please feel free to tell them to make a punishment appeal here (https://sagepvp.org/forum/forums/punishment-appeals.14/) and please make sure to use the correct format found here (https://sagepvp.org/forum/pages/punishment-appeal/). Please don't ask staff about your appeal because it would make it seem as if your appeal doesnt get check for a while.
I wish them the very best of luck in their appeal and I hope they've learned from their mistake!