Hi, We purchased a second-hand car privately on the 30/7/16. On the way home from picking it up, it had transmission issues. The seller was called within a couple of hours and denied any knowledge of it. Looks like we are up for at least $6000 to replace the transmission. Also, the seller was asked a few times whether there was anything wrong with it and said there wasn't (documented in messages). What are our Australian Consumer Law rights?