Kigen's Anti-Cheat

i've been gone in iraq for about 3 years now and i let my brothers play on my account and i get back and i get this
KAC ban list message.

sv_consistency something.

SteamID : STEAM_0:0:19602276
what does it mean?????

KAC ban is valid.

Sorry, but it means your account was caught cheating. This is irreversible.

~Locked