Keep giving it a try in case there are cancellations. Otherwise I would try for a walk-up!
I know when I called a few months ago, I called the moment Disney opened at exactly 90 days before I wanted the reservation, and there were already a couple of parties booked around the time I wanted at Le Cellier!

I don't know HOW they did it! I was seriously on the phone with a CM at like 30 seconds after opening!