I came across a website that has several products for sale for a price of $0.00. I placed a test order to see if the website was glitching. At no point was I asked for credit card information, but the order seems to have gone through - I have received an order confirmation email. I have two questions regarding Australian Consumer Law: 1) are they bound to send me the products, or can they cancel the order once they realise the error? 2) if they do send me the products, am I liable to pay anything?