My lost parcel

@TheCourierGuySA i have tried all their social media platforms including emailing them regarding my lost parcel which was suppose to be delivered Monday, when i.tracked it yesterday it showed it was delivered.Then i was told the driver who was handling my parcel got fired What i dont understand how my parcel was delivered to some9ne who had no pin, no driver called me Monday to check if he was coming nor asked if I'm around the address that was on the invoice/slip..Today i receive your whatspp asking me to send you the cost of my invoice of the parcel I need answers and my parcel Please!!!!!