Not satisfied with the service

It is with great sadness that I am writing this complaint. On the 29th of April, my mother took my brother's groceries to Postnet in Meadowdale to be delivered. However, to this day, his groceries have not been delivered. We trusted your courier service, but you are failing us. How long does it take to deliver goods? There are other people who can accept the delivery, but you only called on them. Please call Ntate Mogale ***