Delayed Delivery since 9th of April

I sent my parcel on the 9th of April through Postnet Blue valley branch in centurion to Bloemhof. I was informed that since it's a remote area, it would take 2 days instead of overnight. I followed up on the 13th of April with both Aramex and Postnet, constantly leaving messages and being told that they escalated. Noone seems to know where my parcel is stuck. Since the 13th, it's been showing as out for delivery, till today. Everytime I call both they are still trying to track with the delivery agent or waiting for feedback. This is very frustrating as these are critical documents. I have also logged a complaint with Aramex online but it was closed without anyone giving me any feedback. I must also state that the Blue Valley branch staff is also very helpless in this process. It's really disappointing. I will never recommend Postnet to anyone in future because of the bad experience I am having.