FedEx-lost all faith in their service

Very disappointed with the service of FedEx SA. Firstly, it was such a hassle to get a FedEx representative to assist me with the pick up of documents. Only after I spoke to the third representative, I was assisted with the process and pick up. They came to pick up documents at my work, last week Tuesday. To be precise 12 papers scheduled for delivery in the USA @ R620. I was promised that my documents will reach its destination in 4 working days, so I assumed that it would be save to make use of their services, since our package will be there on time. These documents expire this week Friday. More than a week later, our documents are still in Elandsburg according to FedEx tracking, for almost two weeks. Not one of the FedEx representatives can tell me why there is such a long delay or provide me with more info. Today they told me their systems are offline but that it was on flight Monday. However when tracking the parcel it shows the opposite. Their delivery date states tomorrow, however I have lost all faith in their services. After numerous calls and emails I am left with empty promises from FedEx representatives that will help or give me info. We'll Friday is around the corner. No answers! It is going to cost us a couple of thousand rand to restart these paper work, just because FedEx did not deliver. I am so disappointed!