Parcel stuck at JiMC hub

I have been waiting for a parcel that was sent from Kenya(tracking number CP ********** 87KE) on the 8th and arrived in SA on the 20th. It took me 3 days to find the local tracking number myself (II ********** 29ZA). The parcel left the mail hub centre on the 31st. All efforts to contact the call centers if the post office has been in vain. They are always "experiencing high call volumes". I have also sent emails to 1. ********** 2. ********** 3. ********** 4. ********** 5. ********** No response from any of the above. How do I know where the parcel is when calls and emails go answered? I need my parcel. I regret using the post office.