The same thing happened to me except I had my demoknight loadout and I was in a x100 weapons server you're not alone in this.

Username: Comicsanwich What is your type of punishment? Ban Where were you banned from? Servers What is your SteamID? STEAM_0:1:170625989 Who has punished you? CONSOLE Why were you punished? [Anti-Cheat] Aimbot Detected (ST) | Weapon: tf_weapon_sword Why should we revoke your...