call the RSPCA and DERM. though bear in mind that the RSPCA does not license reptiles etc under the NC Act 1992, so doesn't really have that much power enforcing it.
DERM may be slow to respond (in your eyes) but imagine how many calls they get about this and other (larger) instances, and how small their budget would be for enforcement.
to spend time and energy investigating these things, they would have to justify the legitimacy of the complaint.
also, imagine how this would stand up against the cases of large-scale breeders mistreating hundreds of animals, often also involved in the drug trade. or investigations into largescale killing of fruit bats or other wildlife.
just be patient and follow up your call once a week.