Poor client service

I had a parcel sent to Kimberley from Postnet Century City on Tuesday, 4 November 2020 to be delivered on Friday, 7 November 2020. I have paid in excess of R500 to have this parcel delivered on Friday based on the information they provided me. I had an option to have it delivered on Monday at a lesser charge or on Friday for almost twice the price. I opted for Friday 7th because it was an urgent delivery. The lady that assisted me called Chanel informed me that the parcel will definitely be delivered on Friday 7 November 2020. Low and behold the parcel WAS NOT delivered on Friday the 7th. When I called to follow up on this, they changed their story and tried to convince me that they informed me that the area where i wanted the parcel to be delivered will take longer than Friday 7th which is incorrect because they have given me the options upon which I chose to pay more to have it delivered on Friday, 7th. The manager I spoke to, did not listen and drew her own conclusions and made me to be the ****. She put the pone down in my ears and when I tried to call back they did not answer. I tried about 3 times to call her back but to no avail. I want a refund for paying more than what it would've costed me had I opted for the following week. This is day light ******* and I will not stand for it.