Worst service by Courier Guy

I booked a collection on Friday for an overnight, parcel from East London to Joburg. Paid the extra price for it as well. It was supposed to be delivered monday. On Tuesday, today, I decide to make a follow up. Firstly, I go through 3 people from their customer line before I get to the one who is willing to help. First one could not ship my call fast enough to God knows where but it cut off. Second one kept saying he cannot find my parcel and flatly refused to transfer me to a supervisor(according to him my issue was not serious enough). Third was helpful although it amounted to nothing. She gave me a number and told me to demand to speak to a manager from the collection depot because she didn't know what to do anymore(this was after her calling Joburg depot who knew nothing about said parcel, and calling east London, who also knew nothing apparently). The phone was answered by a woman who put me on hold for an entire hour(im not exaggerating). I went back to the customer care line. I was told to call the person who wrote notes under my parcel on collection. He cut my call and texted me to send him a message, which I sent explaining what was happening and he never responded. This is a parcel that is already a day late and no one is willing to tell me what happened. The only entry on tracking is when it was collected, but the entry shows on transit. Two days later nothing. They cannot tell me where exactly is the parcel because it was not logged in their depot according to them. This has to be the worst experience with a courier company. Worst of all the documents are time sensitive.