Bad Service from Delivery man and colleague!

My courier arrived in Cape Town on Friday 26th June in the morning according to the tracking info. When I called DHL to find out where was my courier they told me that the driver couldn't find my address whereas my full address was written on the DHL enveloppe as well as my number. He didn't even bother to call me when he arrived in my area at least to get directions from me! When I called my sister who sent me the courier and explained to her what happened, she immediately scanned the receipt she received from DHL when she was sending the courier and emailed it to me. When I checked it my full address and number were indeed there! Obviously that driver couldn't read and was too lazy to work that day! When I called the call centre, they told me that there was nothing they could do and that I have to go to the airport to collect my courier. Unfortunately they don't work on week-ends so I had to wait til today, Monday to collect it at the airport! As if I wasn't frustrated enough, when I get there the receptionist couldn't find my courier! So I had to wait 30 mn and eventually she found it! I used to have a high esteem for DHL but now they are losing their good reputation!