DHL South Africa - Absolutely Poor Service

On the 6th of Dec, I had an urgent parcel to send and decided to give DHL a try (after years of using The Courier Guy) and what a mistake that was. I requested an express delivery from JHB to PTA, I called DHL and spoke to a lady by the name of Nestar Rantho to ensure that my parcel would be collected same day and delivered the next day - she confirmed that all is in order and my parcel would be collected before 5pm. My parcel was ready to be collected before 9am however by 5pm, no one had come to collect so I called Nestar. She said that there was an error on their side with the package routing and that it would only be collected the next day. I was a bit concerned and asked if she was certain it would be collected the next day as it was quite urgent and she said it was scheduled and if someone doesn't arrive by 12 the next day to collect I should give her a call. Today at 12, no one had arrived - I called Nestar AGAIN and she said that there is another error their side (she could not tell me what the exact problem was this time) and that my parcel would not be collected today - It will be collected tomorrow (Wed 08 Dec and only be delivered on Thurs 09 Dec). The parcel was meant to be in PTA this afternoon (Tues 07 Dec) and because of the incompetence from the Customer Service staff at DHL - my urgent parcel will be arriving 2 days later than what was paid for. I have had to cancel the delivery with DHL and request a refund. I have also had to rebook my delivery with The Courier Guy. I find it worrying that Nestar Rantho who is a Customer Service Advisor does not have the decency to inform her customers that their parcels will not be delivered as scheduled and paid for, additionally she does not know why they will not be delivered and has no inclination to even make an effort to help or express any kind of apology for the inconvenience caused. I will never make use of DHL again nor recommend them to anyone.