No Delivery of Parcel

I bought a parcel from the U.S and I have been tracking it via the USPS website. After my parcel arrived in JHB INT mail hub on 26/06/15 since then I haven't received any feedback until I got an email address for SAPO customer service. Shadi responded my email with a domestic tracking number: II***ZA and when I track the parcel can see that it went out of JHB INT mail hub on 02/07/15 for delivery, according to the update I was notified of the delivery (even though no one contacted me) now my parcel is back at JHB INT mail hub. Shadi is no longer replying to my email, no one picks up the landline, you will hold for +20minutes. I really need my parcel