SA Post Office Customer Care service not operational

Since the 19th of October I have been unsuccessful in making contact with the SA Post Office's customer care regarding an international parcel. It is now 2 November 2018 and still no avail. I ordered goods from the USA and the US company dispatched my parcel from their business on 4 September 2018. I was able to track the parcel through their postal system with an international tracking number provided and it departed the US on 16 September 2018. The last tracking information I have is for 17 September 2018 where it "departed a transfer airport in JOHANNESBURG INTL, JOHANNESBURG, SOUTH AFRICA on September 17, 2018 at 5:54 pm. The item is currently in transit to the destination". I waited a month before trying to contact the SA Post Office as previous international parcels took over a month to reach me after landing in SA. The US company cannot provide me with the local tracking number and the SA Post Office website gives no information on the international number. Hence since 19 October I have been trying to contact the SA Post Office customer care regarding the local tracking number. I have phoned and emailed and no one answers the phone nor replies to my emails. I held on over 10 minutes on my last call waiting to speak to an agent. The waiting message indicates that an email can be sent but no one replies to the emails I have sent.