Handing over parcel to wrong person.

Worst courier service in the country, my clients parcel was handed over to a complete stranger, how do you hand over a parcel with a clients name on it to a person with a totaly different name and still recieve their signature without even contacting the correct recipient of the parcel, a courier service key performance is to deliver parcels to customers, so how the hell can a driver just hand over with no regard a parcel to a stranger with a different name??????????????????????????? 4k worth of goods gone as we cant track the person who recieved the parcel, i have tried for 2 solid days to phone the Durban depot manager and the phone just rings once im put through to her office, then they tell me she will phone me back, it does not happen, i try to phone again, they say she is not in office and i must email, i have spent so much money on airtime waiting for someone to answer and listening to the ****ty music playing over and over, i have emailed everybody i possibly can at Fastway regarding this matter as its urgent, i get no response, they dont care that a employee of theirs gave my clients expensive goods to the wrong person who clearly has now ****** them, im now held responsible to pay back 4k, this has happened before, a Fastway delivery driver gave my clients parcel to a chap working in a garden, my client had to get in his car and drive to this residence to go demand his parcel from this person, disgraceful right? to date i am still waitin to hear from the Durban depot manager and answers to all my emails sent to Fastway, you guys are pathetic.