Parcel missing

I have this international parcel was sent by my family overseas to South Africa, it was delivered to Rivonia Post office on 4th April 2015. Rivonia post office phoned me to advise the custom duty amount, and asked if i want them to send it back to custom for a reassessment, and i said yes. then parcel was sent back to custom on 10th April. <br> For the past month, i have been trying to call and email the custom and post office to query where is the parcel. Two people in Post office rep**** me in email told me this parcel has been sent to Randburg Post office on 6th May 2015. But when i went to Randburg post office, the lady working there told me it is not with them, it's still sitting with HUB. <br> the parcel has been in SA for over two month, and no one can tell me exactly where is it.