Not sure how many others have been ripped off but I've recently noticed a lot more scammy third-party sellers on Amazon.com.au.
So I contacted a US firm called Marketplace Pulse and they've created a list of 36 sellers on Amazon Australia which have more than 50 per cent negative feedback. Thought it could be interesting reading for anyone still waiting to get their money back: https://www.scamsellers.com/amazon/australia
And if anyone has any tips on how to speed up the refund process, please let me know.
I'm out $905 on a Nikon Df camera that has never arrived. The tracking number was a fake China Post one. The seller falsely claims they've refunded me in gift cards, and Amazon is making me serve a series of waiting periods (three days after longest delivery date, two days for contact, 10 days for non-existent refund, 10 days for investigation and actual refund…).
Don't buy from third-party sellers on Amazon. Problem solved.