ok,so say you have a banned/muted account well i know how to get it unbanned/muted (works 80 percent of the time)
all you have to do is make yourself a member /andor if you alredy are a member send them this message
why is my account (banned/muted) ? ive been playing runescape for a very long time not just so you can bann me..i think you set this up, waiting for my money and then just banning me its not fair, if you dont unbann/mute me ill sue!
idk if itl work for you but it worked for me..also you can be creative and make you're own letter but make sure it has sometthing about sueing in it

D