http://www.accc.gov.au/consumers/consumer-rights-guarantees/repair-replace-refund
You can ask for a refund if the problem with the product is major.
What is a major problem?
A product or good has a major problem when:
it has a problem that would have stopped someone from buying it if they’d known about it
it is unsafe
it is significantly different from the sample or description
it doesn’t do what the business said it would, or what you asked for and can’t easily be fixed.
A service has a major problem when:
it has a problem that would have stopped someone from buying it if they’d known about it
it is substantially unfit for its common purpose and can’t easily be fixed within a reasonable time
it does not meet the specific purpose you asked for and cannot easily be fixed within a reasonable time
it creates an unsafe situation.
You can ask for a refund if the problem with the product is major.
What is a major problem?
A product or good has a major problem when:
it has a problem that would have stopped someone from buying it if they’d known about it
it is unsafe
it is significantly different from the sample or description
it doesn’t do what the business said it would, or what you asked for and can’t easily be fixed.
A service has a major problem when:
it has a problem that would have stopped someone from buying it if they’d known about it
it is substantially unfit for its common purpose and can’t easily be fixed within a reasonable time
it does not meet the specific purpose you asked for and cannot easily be fixed within a reasonable time
it creates an unsafe situation.