Book a date with TASCAT. I haven't used the Tasmanian one but in NSW it cost me a couple tens of dollars from memory and I got a response in days. Once the case lands with the _LAWYERS_ who are expensive, it'll get resolved.
Civil tribunals in Australia (an equivalent of small claim courts in other countries) do not involve lawyers in vast majority of cases and encourage self-representation instead.
In fact, the NSW Civil Administrative Tribunal explicitly requires the Tribunal’s explicit permission for a person to be represented by somebody else, including a lawyer.
But tribunal's decision is binding on the commercial entity, should it be found at fault and incurs penalties for avoidance or non-compliance with the decision.
https://tascat.tas.gov.au/