Postnet - Worst courier service

At the end of last year, I went to Postnet to courier some documents to attorneys using the express overnight option. I had a feeling something would go wrong because the guy that was processing my courier took a very very long time to find the address / place on the system. Eventually it was done and they told me that it would be delivered on the Tuesday, I was there on a Sunday. A few days go by and I decide to ask the attorneys if they have received it. They said no.I call the branch that I did it with, they said that there was no one there to receive the document so they couldn't deliver it and they will try again. Another few days go by and the same story!!! I now get angry with the attorneys thinking that it's their fault. Two weeks later from the date that I did it, after calling and calling and tracking the parcel and also getting upset with the receiver, the parcel finally gets delivered. No apology at all from postnet, No phone call, nothing. And after speaking to the attorneys, I realized that it was actually Postnet's fault. I also sent them an email complaining after that, no response till today. I spent so much of money just to have my courier delivered 2 weeks later.