FedEx Did not deliver by promised date then blamed me for it and called me a liar Montgomery AL

My package was supposed to be delivered on 11/16 before 8pm... So i waited around the house the entire day for it thinking that it would be here when they say it would... Well 6pm rolls around and I get nervous so I check the app which has now changed the delivery date entirely to 11/19...

So i panic and called customer service who says there is nothing that can be done because i changed my delivery time to a future date which I definitely did not do since I am waiting on the delivery so i can leave to go out of town on a non-refundable trip.

I ask to speak with a supervisor and after a few minutes of waiting am told that the supervisor is not available and I won't be able to speak with them. I then demand to speak to a supervisor now... Wait a few more minutes and finally the supervisor picks up only to tell me that my package was never supposed to be delivered today(11/16).

Which is completely inaccurate per multiple texts and emails saying it would be. I then plead with the woman to let me go pick up my package myself because I know it is in my city. I'm informed that the local office is closed and nothing will happen until possibly 11/18 but definitely by 11/19.

So after not getting my very important package by the said date, I'm accused of it being my fault that it wasn't delivered then am told I'm wrong and it was never supposed to be delivered by the date the company told me it would.

Not to mention a large amount of money lost because I was unable to go on my vacation (non-refundable). I will never use FedEx again... This has been nothing but a very expensive and inconvenient headache.

I just hope my package actually finds it here on the 19th but I'm not betting on it based on this companies lack of competence. It will be a miracle if it does! Horrible company all the way around the board!