shocking customer service

Was told by DHL Couriers Medical package from USA had been delivered to my home address, it had not. After Many calls to DHL was told it was at Main PMBurg P.O, after 20 min wait at this difficult to park place for a 90 yrs old, it wasn't there..... Got on to P.O. Main enquiry ppl, told it was in remote minor P,O.: Willowton P.O. After half hour wait outside locked door as single staff member in back retrieving someone else's package, had to pay P.O. Fee R36. ...So total cost for Free delivery as paid already in USA, was 2 Taxi fares to P.O's R38 X 2: R76+R36 P.O. fee, R112 in all as DHL wouldn't pick up my wrongly delivered Meds. Their lack of concern was so rude causing me so much run around on giving me incorrect info from beginning to end & their refusal to get from P.O. & on to me, 2 weeks of frustration.