Next day delivery promise is a lie

On Tuesday 27 jan @ 14:30 I placed an order which was R500 so i should have received free delivery but i opted for express delivery so paid another R60 extra. You advertise that if order placed before 16:00 it will be delivered next day - it is now friday and still no delivery. This is the 3rd time this has happened to me. I expect a full refund of the delivery fee as you guys are in breach! Order no: ***