The only way is to contact Angiemeez - www.meez.com - but she won't unban you unless the admin who banned you made a mistake. If they intended to ban you, even for a reason you don't think is fair, the ban will stay.
This is smart thing to do to get free 1 year vip on meez.send a pm to roscoe meez saying that you mail 50 dollars to them for 1 year vip and you never got that vip.
Contact him through email, or send him a pm on meez. You can also post in suggestions that you need help with a banning and maybe aquameez, one of the admins, will appear and tell you what to do.