Sounds like a pretty s*tty set of circumstances. Sounds like you're doing all the right things though.
If you haven't already, you should be taking screen shots/keeping records of all written communications (incl texts) and even jotting down a contemporaneous note of all discussions (doesn't need to be detailed).
I would hazard a guess that the police may well not be interested. However, the Disputes Tribunal is another option, if you can be bothered investing the time and emotional effort.
Another avenue that *may* be available is the National Enforcement Unit of the Companies Office. Persons convicted of certain dishonesty offences (including fraud) aren't allowed to be involved in the management of a company (though being an employee is okay, as is a sole trader/other non-company business). More information is available here.