Horrible service

On 12.09.2022 I bought a Kenwood Pressure Cooker online which was on sale going for R449. I placed the order, paid delivery and the order was confirmed. I was expecting delivery within 2-4 working days but instead I received an email 2 days later 14.09.2022 from BrandHubb stating that they cannot deliver the item due to incorrect price, there was a system error. How is the store's error my issue. They put up a price which to me was reasonable and affordable now they want to inconvenience me. How are their internal system issues my problem??As a customer who paid and got confirmation i want what my order delivered. Consumer Protection Act is clear about things like this. Every store knows that once a customer sees a product with a different price from the one on floor/till the product is sold at the price the customer saw it. It is their duty to ensure that prices are correct at all times- when there's sale or no sale