PHONE DIARRHEA

My international parcel has been in the JHB International Mail Centre (HUB) since 15 May 2018. I have called the Head Office and several other numbers, which eventually get cut-off due to no-one picking up. I am fed-up with this as I urgently need my parcel. I eventually spoke to an individual who couldn't assist as they didn't have access to locate the parcel...an employee of the Post Office? I am prepared to pay a courier to collect the documents from JHB Centre as I stay in Pretoria. However, they never answer their phones and I am unable to arrange this.