Postnet - Lost my parcel and pathetic customer service

On the 22nd of May I went to Postnet in Ermelo (MPU) to send my parcel to Postnet in Glenwood. This was an emergency parcel. I was told the parcel will be there in 2 - 3 days as usual. When my brother went to fetch the parcel on Monday he received an incorrect parcel which was meant to go to Bloemfontein for another customer. What my brother received were motor license disks and my parcel was my Identity document. Trusting the company, i gave them enough time to trace and ensure that the parcel is delivered this week. Hence no one is updating me, telling me whats happening is the parcel traceable? My brother sent back the other documents we had incorrently received but since today (5 June 2018) they do not know where my parcel is. Postnet is blaming Aramex and vice versa. Frankly I do not care who made the mistake, as a customer I shouldnt be bothered by those details, I want this sorted. As I am writing this review, I don't know if I'll ever get my Identity document cos apparently it was received in Bloemfontein but no one knows the person that signed for it. I was not sending my ID just for fun. A lot has been delayed due to this and no one seems to be bothered. I am very frustrated and ****ed by the lack of customer service the company has shown me. I tried to call the head office number 011 and 086 and it went unanswered.