Missing parcel with no answers

I sent a parcel via pudo from durban on Friday 25/04 to Limpopo and on Monday 28/04 it arrived at Limpopo hub and there has been no trace of the parcel since. Numerous calls and I am told it may be lying around somewhere and they will ask the driver who is off duty. How can a parcel just go missing without a trace? I am very disappointed by this as this is a very expensive product and i had trusted your service to deliver safely. No one is giving me any answers.