Sorry to hear that you're going through renovation dramas fionas...as if renos aren't stressful enough?!

No, I haven't ever been in the type of situation you're in so consequently haven't needed to call in the media, but I wondered whether you've tried to contact Consumer Affairs or an ombudsmen in your state for the industry concerned? Usually they have some type of avenue to give you some support and possibly give the company in question a bit of a push??

Just a suggestion. Good luck!