Unfair treatment

I ordered an item at takealot and it was R209. I paid for and received a confirmation email. About 2-3days later I received an email that my order is cancelled there is no stock available. I checked again and the item was there with a new price of R496. I sent an email to enquiring about that and I received a response that the supplier couldn’t deliver the stock on time. I don’t even know what that meant as I wasn’t given a time my item was going to be delivered. What I did not understand that I mentioned on my email was that the item is on takealot and double the price. They could have delivered for the people who ordered and up the price for the once that were going to buy later. To cancel the order that is already placed and then up the price is just unacceptable.