South African Post Office Brixton

SAPO Brixton did NOT send notification of a parcel that was sent from the U.S. My son eventually went there to find out if it was indeed at Brixton PO( which it was from 26 Feb-3 may) and they Said that the tracking number was from DHL, therefore, they could not help him. No info on how it had to be converted to an SA tracking number or any help of any kind, whatsoever. I eventually called Customer care, ( which by the way ,only have 5 people working there to service the ENTIRE COUNTRY!) It took 2 days to get through to them...who helped me get one. Back at the Brixton PO, the manager was not in yet, at 10am, and she was the only person who I'm told will be able to help me. Nobody wants to take responsibility for notification slips going out, and nobody knows who delivered them.