A CM told me that a lot of people hold onto their reservations until a day or two before and that if I really wanted something, I should try back a day or two before. I made my ADRs 180 days out and now have 7 days left - I just decided to see if I could add CRT at the last minute and someone else just cancelled and I picked it up. I would keep on trying! Good luck!
I am in the same boat with chef mickey's...i need an earlier time then we have booked as our flights were changed
I try twice a day and nothing with four weeks left