I feel your pain!
My dealership gave me incorrect dates on two occasions, each time I got my hopes up and then each time the date came... there was no car.
But on the third go, they told me "one more week from today". This was Monday the 24th... then on the 26th, they called and said the car was on their lot, five days earlier than I had just talked myself into being patient for. I took it home the next day. So, maybe you'll get lucky like that too?
I hope you get yours soon!