Law firms do not work for Free. Their employees must be paid...

Law firms do not work for Free. Their employees must be paid salaries.
They are Not like ASIC, whose employees are paid by the Government.
If you flood them (Law firms) with hundreds of emails, they could turn around and sue you.
There are plenty of law firms in Australia that specialize in Class Action. Work out what you want first to do.Give them a call.
Ask them what information you need to bring and how much it will cost for them, to conduct an investigation.
Good luck.