There are no Reserves on Ebay Australia, except in a couple of categories like Motor Vehicles and Real Estate.
If there actually was a (proper eBay) Reserve - if the item didn't meet reserve then it isn't a "sale". You just move on.
If it's some kind of "seller hidden" reserve, then the protocol is that they are supposed to sell to teh highest bidder. But you cannot force anybody to sell to you. If they refuse to sell, then you leave Negative Feedback with a comment like "Refused to sell at the auction price" and then you move on.
