On our website we acknowledge the need for a complaint/mediation policy and announce our intention to attend to this as resources become available

Well, it’s a good day to start, I’m not sure of a process but here are some resources

Mediation

The Office of Fair Trading offers some resources and notes that The Supreme Court can make orders

Seems like a bit of overkill to me but there you go

Managing association disputes

The OFT has a draft Grievance procedure

which looks pretty good to me

https://www.publications.qld.gov.au/dataset/oft-incorporated-associations-forms-and-guides/resource/ec5ce24d-0ef0-4dc3-9e44-f9f8eaa10d39

We can get free Mediation

https://www.qld.gov.au/law/laws-regulated-industries-and-accountability/queensland-laws-and-regulations/associations-charities-and-non-for-profits/incorporated-associations/running-an-incorporated-association/managing-association-disp