Martin , you should've made an unban request straight away when you got banned , not to wait weeks before making it .
Now the banlist/logs will be checked and the admin who banned you will be found , but if he don't provide a demo , that's not hes fault , because admins can delete their demos after a 7 day period , that means you can stay banned even if you haven't used cheats .
Anyway High staff will decide , be patient .
Good luck .