I went through the same – denial, then finding an attorney. She is no longer taking clients, and works locally.
You need to be with them in your state’s federal court, in front of a judge. Sounds intimidating (and it was for me!) but the attorney should prep and practice with you beforehand when you get a court date.
A resource I found is:
https://www.auntbertha.com/
There is a Legal section after you search on your zip code. I tried and found a couple disability resources in my area. I hope you can find something similar.