Don’t out the company’s name if there’s possible pending litigation against them. This link might help you out:

https://www.mondaq.com/australia/consumer-law/315518/how-to-make-a-complaint-against-your-solicitor

What language was the post written in and where was it posted? If the subsidy is in Australia and written in English it’s likely it’s for the Australian market which is where I would recommend you filing your complaint.