My Worst shipping experience so far

I have been shipping packages for a good while and with relatively good experience so far ...with other courier services. For the first time ever, I asked my supplier to ship via FedEx and I am regretting that decision. After bouncing all over the place, my package finally arrived in the country and the status has been funny, misleading and discouraging ever since, going from "Delivery scheduled for Monday " to "clearance delayed, Scheduled delivery pending". I have called and spoken to a number of their consultants who have each time given me a different story all of which are not consistent nor add up at all. One, in particular, was very rude and unprofessional. This is for a package that makes up a part of a product I sell and I have clients on my case for weeks now. I have actually run out of what to tell them after given assurance based on "FedEx Scheduled delivery date". I am never using this service again, even if its the only one operational, as I have never been disappointed like this before