@Pixiepie null
The best and most reliable way to track agents is via www.mara.gov.au
That’s our professional/regulatory body, if you’re using other means, you need to do further research as even the immigration website directs you to this site. It tells you the history of the agent and if he/she has been sanctioned by the professional body. I’ll be skeptic to use any other website if I were you.
Best of luck on your journey!