Online shopping

Good day I recently bought an item online. I seen that my order was cancelled by Edgars without notifying me. The call centre lady phones and says we cancelled your order due to a mistake on the price. According to the consumer protection act you have to sell the goods that the consumer saw the price for. I had already paid for the item. The call centre agent then tells me to call her manager. You guys made the mistake and i must waste my time calling you. I seen the item at that price i paid for it and according to the law i expect to receive it