If the seller claims to have provided me with a receipt at the time of purchase, can he later, that same day, refuse to provide me with another receipt copy under Australian consumer law? I went into a store later in the day as I didn't get a receipt originally and asked him if he could provide me with one—"the machine only prints it once," he said. I asked if he could write one manually on paper with the date and time of purchase—"I can't remember when you came in and even if you did" he said. What could I do in this situation? (apart from fuming with an impotent anger).