Worst courier company ever

Worst courier company ever. I was supposed to recieve my Unisa study material yesterday the 7th july, checked online it was still not out on delivery. Spoke to Louise she said she will email the manager and make sure it's sent out, yesterday afternoon the parcel was out on delivery. Called this morning to find out more or less what time the driver will be coming as I had appointments and needed to be here, they told me 2pm. Called at half 2 and spoke to Louise again, was told the drivers phone is on voicemail they can't get hold of the driver. I have an assignment due on Friday the 10th and still not study material.. Bare in mind unisa sent this to them on the 5th already and study material should be regarded as urgent. The rest of the other call centre agents tell you to hold the line and put you through to a survey.. I will never use this courier company, emailed unisa as well to inform them that they should stop using them, I don't seem to be the only one complaining. Theres 100s of complaints about this courier company.