What can I do to stop Aetna from harassing me and realize that not all disabilities are the same?

I am on disability through Aetna because of the neurological effects of a stroke. My condition has essentially been the same for a year and half in that some of the physical effects of the stroke diminished, but I still have permanent effects, specifically with my speech and with neurofatigue that makes it impossible for me to stay awake a full work day and keep a schedule. My previous job was one where I spoke a great deal of the time at a high level of communication. The problem is Aetna has absolutely no understanding of what my disability is as they have my neurologists fill out this form as to whether I can bend, lift 50 pounds be in a hot environment etc. This isn’t even part of a neurologist exam and the doctor couldn’t tell this in their exam of me. It’s not like I have a broken arm or back that’s going to heal after a few months. I have a brain injury. And all that physical stuff could be faked if I wanted to go to the lengths of trying to fake it. I’m not. That’s not how I’m disabled. 3 different doctors are never able to give them what they need and it’s always a nightmare. Now I’m on Medicaid and my last appt. was at a public hospital and i can’t even speak with the doctor and I’ve sent Aeta 4 different forms I’ve gotten from doctors since January and they still say they don’t have the right thing. Is there anything I can do about this to get them to stop harassing me and realize my problem and that all disabilities aren’t the same?