Unum won’t return my calls. Going to be a long fight.

I was told that after 2 years that Unum would review my LTD to see if I can do other work. Well, guess what Unum decided that I can do other work, which involves sitting and standing, which is the worst thing for me due to back surgery. I can be up on my feet for a few hours but need to lay down to relax. I can barely sit at a dinner table let alone sit at a job. This is stated in doctors notes. Unum even is claiming they spoke to my doctor and said he stated I can do sedentary work. Seems odd due to the fact my doctor is a female. Letter from Unum states I can work and my case is closed. In process of appealing. Of course Unum won’t return calls. Going to be a long fight.