If I have bought a secondhand Gucci watch for $570 on Gumtree interstate, payment was made through bank transfer. After I received the watch, I found that it was defective and requested the seller for a refund but it was refused as he claimed that the defect was the result of improper handling during delivery. So I brought the watch into Gucci dealer for repair but was certified that the watch was a counterfeit! It was not a genuine Gucci product. How can I get my money back under Australian Consumer Law? Can I sue for breach of contract since he said it was a genuine Gucci watch? FYI, I am from Brisbane and the Seller is from Sydney.