Welcome to the club. Read backward on this thread and you will see that many of us have been dealing with this for the past MONTH!! Every day, calling, checking this thread, sending emails and calling Guest Relations.
I got on the Dessert Party ADR Hell-Train way back on March 10th, which was MY 180-day out mark. Made all of my other ADR's for our visit w/o any problem, but the Dessert Party ADR has been well, less-than-magical! Today, the CM asked me if there was anyting I am celebrating on this visit. I replied, "If I ever get this ADR, THAT will be what I will be celebrating!"
Dessert Party ADR Hell-Train! I love it! I wish we were passengers aboard a different Disney Train together!