Mr delivery fails to deliver!

Im absolutely appalled by the service delivery or should i say lack of delivery. They should not be called Mr delivery as they fail to deliver. I placed an order at 9.30 for over R500 and the order was accepted and due for delivery at 10.30. At 10.25 i receive a call to say they wont be delivering! I have guests at my home waiting to eat and by this time it is too late to order. This is unacceptable and all i get was sorry for the inconvenience. So how can i order food at this hour due to their incompetence!!!