It's not every day we have a player grief, violate pvp rules, aimbot hack, and kill innocent players in pvp-off protected regions to steal their items. Edit: and I forgot to add that you guys seems to have a network of about five people that have some level of account sharing and IP sharing. Many of which have also been involved in offenses.
Considering all of these recent actions, I'm unconvinced you've had the time to change. I'm just not interested in unbanning you at this time. You may re-appeal in 2 months.
Appeal Denied. Do not attempt to evade the ban on another account.