Order cancelled - after placing and paying for item

Very disappointing service. I had purchased a cot on Monday during their blue dot sale. The item was paid for in full and I received the order number was just waiting for the item to be shipped. Today, 4 days after I placed the order, I received an email from takealot to say my order has been cancelled because the supplier is our of stock (note that it WAS in stock when purchased and paid for). This is deceiving and just down right wrong. My account will be credited or I can opt for a refund that I will only receive in another 5 working days. Extremely misleading - I guess this is what you have to deal with when u decide to shop online!