No stock yet price of item increases

I ordered an item on takealot which showed that they had stock and was due for delivery a few days after. The item was remarkably cheap and now it is 100percent more expensive and takealot tell me they do not have stock and will refund me yet the item still displays ships within 5 to 7 working days. I am been ripped of by their incorrect pricing and i want them to be held accountable and deliver the item at the price i paid. Refunding me is an easy way out when they want to pick up prices.