And from a quick look at the Melbourne VTC, there are two salt evaporators near Avalon, and I can't find anywhere named Point Richards. And you're surprised ATC didn't know where you were?
The least ambiguous reply would be a bearing (or direction) and distance from a known location, the best known, and most easily identifiable to pilots (both IFR and VFR), and whether they are local or not, is the airfield.