LOST PARCEL/BAD CUSTOMER SERVICE

I've been trying to locate my parcel for the past 3 days, the parcel numbers show that the parcels have been delivered and signed for. I never received anything from fastway and I have never authorized for anyone to sign on my behalf. I've spoken to different consultants one of them being Mabusha Seleka, form the 8th Nov-10th Nov 2021, the company cannot get hold of the driver, who "supposedly" delivered my items. I then spoke to Sitha who said he'll try get hold of the driver and find out about the parcel, I have not received any call or feedback from him. CAN FASTWAY ADVISE ON THE SOLUTION/ WAY FORWARD ON THIS MATTER