Can a store change the price after purchase?
No, a store cannot legally raise the price of an item once you have paid for it.
What happens if a retailer advertises the wrong price?
In general, there’s no law that requires companies to honor an advertised price if that price is wrong. Typographical errors, miscommunication and other glitches can result in items being offered at what appear to be deep discounts – discounts that would be ruinous for the company if it were forced to honor them.
What if an item goes on sale after I buy it?
All you have to do is simply return the original item you purchased and buy it again at the lower price. First ask the store if they will extend their 30-day price match policy. If they won’t, since the store has a 90-day return policy, you can simply return it and buy the item again at the lower price.
What happens if something is priced incorrectly?
In stores: If an item is priced incorrectly on the shelf, or scans at the wrong price at the till, retailers are under no obligation to honour it, under the Sale of Goods Act. They can offer the item at the correct price or refuse your money and withdraw the product from sale.