[Upheld] random ban?

[Chiyomatsu]

Your Steam ID:STEAM_0:0:156245850
Your In-Game Name: Chiyomatsu
Server you were banned from:zombie survival
When were you banned?:i dont know 
Who you were banned by?:i dont know
Why were you banned?:console variable manipulation
Why should you be unbanned?:well i just got gmod a friend told me to get it so i got it and i go to gmod and he told me to join him but when i join i see a message that i am banned from the sever i dont know how this happened if this is my first time play zombie survival i would like an unban please so i can play with my friend