They do not do anything about cheaters mate. They don't investigate, read your ticket or develop anti-cheater tools. They will just send you an automated email which claims they have an anti cheat. Cheaters have been completely controlling Australian official servers for years.

To confirm, a hacker just killed me on this server at 7:34pm Brisbane, Australia time. My in-game name is Braff I believe. I was located at a guardhouse in the town of Nvodmitrovsk, the western most guard house. Killed through a wall with no player near me. And I was inside a building.