Price change

A week or so ago I logged a complaint for Mr Price Home, as they had advertised and displayed a couch that they did not have in stock anywhere. They let me know there will be stock available this week, when my girlfriend saw it is available online she immediately placed the order and paid for the couch only to realise that the price has gone up by R500 after the transaction went through. If they had stock when we wanted to buy the couch we would have paid R500 less and I would have been able to save the delivery fee as I hired a trailer on the day of my move. It seems that they saw there was a big demand for the product, held back the stock and increased the price to make more money on it. This is *********.