Parcel took over a week to be delivered and Aramex doesn't care!

I sent a parcel from Pietermaritzburg to Uitenhage on the 21/12/2017 and was promised that it will be delivered on the 22/12/2017. The parcel was not delivered on the promised date. I called Aramex on Saturday 23/12/2017 and enquired about my parcel. I was referred to a person called Damin (the most rude person I ever dealt with). He advised that the parcel got to P.E. on Friday after 1 p.m. and could not be delivered on the promised day. I told him the urgency of the parcel and that it needed to be at the recipient's hands before Monday 25/12/2017. My plea fell on deaf ears as he showed no care of what I was asking and only told me the parcel will be delivered on Wednesday 27/12/2017. I told him that it was gonna be too late if it got delivered on Wednesday but he did not care. I have recording of the call I made to Aramex and one can clearly hear the attitude he had when I spoke to him. I escalated this matter to Aramex Facebook. Well it seems as if they are all potatoes of the same bag and unfortunately, the rotten one. All they do is send a response message saying "Sorry, we're following up on your shipment and will have you updated". The parcel was eventually delivered on Thursday 28/12/2017 and it was too late.

I want Aramex to contact me and explain why they took so long to deliver the parcel while they assured me that it would be delivered the following day.