Waiting for a parcel for 4 months

I have been waiting for a parcel for 4 months. This is the tracking history. IT ARRIVED IN JOHANNESBURG ON 22/08/2017. I have tried numerous email addressees and they all bounce back? ********** **********

Tracking Number : UJ ********** 33US Current Status: Received by Foreign Postal Administration Shipment History : Event Date Event Time Event Detail Event City 8/22/2017 11:50 AM Received by Foreign Postal Administration Johannesburg, South Africa