If a retailer makes a mistake and the actual price for the item is more than that displayed the retailers have certain rights. They do not automatically have to sell you the goods at the price stated. It is the retailer's responsibility to correct the mistake as soon as possible. If the retailer knowingly charges more for a product than is displayed an offence may be committed. Generally, if you are told the correct price before you pay, you have no right to redress. If you notice the error after you have paid, you should bring the matter to the retailer's attention who, most likely, would refund you the difference. You could also report the matter to the National Consumer Agency. The office will investigate the complaint with the objective of ensuring future compliance with the Act. This however does not mean financial redress for the individual complainant.