Past due

I place an order twice a month for delivery to my dad who is 83 years old, and everything usually works out just great every 2nd week, This time however is a different story, I placed an order 29 October got notified that his delivery would take place between 14:00 and 18:00 30 October. My dad has been literally standing outside for 2 hours waiting for the delivery. The area he lives is not the safest. The delivery took place 30 minutes after 18:00. Im grateful the order arrived but what frustrates me is the fact that we have no way of contacting the driver to find out where he is in his delivery route. It would be nice if we knew who we can contact when the delivery is late. I had a very similar experience 2 weeks ago when I was waiting for my own delivery, I was given a specific time of 10:45-11:45 and my order only showed up at 13:30... I fully understand things happen , especially with load shedding affecting traffic etc but surely there has to be a mean of getting hold of the driver if your order has not been delivered within the 4 hour provisional window...