Worst Experience ever

I've been waiting for my parcel trace(PP ********** ) that was sent from Queenstown on Friday the 15/06/18 from that day Ive been waiting for an sms that confirms my parcel its on its way now its been more than 3days for they have stated on the wybel that it takes 2-3 working days . on the 19/06/18 i did a follow up on my parcel for couldn't get help on that according to the sales consultant at PostNet Fox street in the JHB cbd Miriam doesn't know wheres my parcel after she checked on the system that's all the answer she could give . My next point i calmly asked her to check the last location at that moment i could see she getting annoyed there after retrieved the information that its in transit in East London it was last scanned the on the 18/06/18. Again i asked what could be the hold up because already it has passed 3days so can i get clarity rudely she just said "I DON'T KNOW CALL THEM" i couldn't believe it when she said that where as i expected a batter answer from an elderly person like her. I questioned her again why should i be there one to call because according to services deliverance PostNet failed but hey she didn't care she just said who should she call because the parcel its in transit so must she call the sky and that was the nail in my head when she said that I wants going to write this report if she would have answered me in respectful manner and appropriate way because i believe my parcel will reach its destination maybe its delayed i could take that rather than rubbing it my face that you simply don't care if that's so why is she even working there if shes not well mentored about customer service. One more thing i cant even trace it online by myself its giving me an error or incorrect trace number.