The coy appears based in Victoria
Opticscentral.com.au is:
Registrant CENTRAL 6 PTY LTD
Registrant ID ABN 88157822618
Registrant Contact Name Andrew Hui
8/23 Cook Rd, Mitcham VIC 3132, Australia +61 1300 884 763 ·
opticscentral.com.au
https://maps.google.com/maps?hl=en&s...A&source=embed
So you might contact Consumer Affairs in Victoria. I believe that all the states have the same laws now since the introduction of the Australian Consumer Law.
http://www.consumer.vic.gov.au/
or
http://www.consumerlaw.gov.au/conten...sumers_ACL.htm
Generally pricing must be accurate, and advertised errors must be corrected. I do not think they need sell an item at an advertised price if their is genuine error, but to avoid claims of misleading or deceptive advertising they would be expected to fix it promptly.
regards