National Breakfast day a shambles at McDonalds

Today McDonalds has the Breakfast day. I pulled up to McDonalds in Woodmead at 06h00 this morning. Their system had not updated and they weren't able to allow the customer to purchase the breakfast day special. After waiting for ±15minutes, I was able to order, but my choice of drink was only a Coke Zero. Who drinks coke zero in the morning. I was not at all impressed. I do have to say that one of the employees did come out and apologise for the system error and that showed good customer service.