ACCC made this in easy english to tell you your rights when you buy something.
http://docreader.readspeaker.com/docreader/index.php?jsmode=1&cid=btass&lang=en_au&url=http%3A%2F%2Fwww.accc.gov.au%2Fsystem%2Ffiles%2F1099_ACL%2520Easy%2520English_Your%2520rights%2520when%2520you%2520buy%2520something_FA_web_0.pdf&referer=http%3A%2F%2Fwww.accc.gov.au%2Fpublications%2Fyour-rights-when-you-buy-something&v=Google%20Inc.