Denied unemployment, how do I appeal? - 26 weeks in

I got a denial letter last week saying I left my job voluntarily, but I was let go as a janitorial supervisor. I am in Jacksonville, in case local advice matters. My employer's version of events does not match mine, and I have emails that show it. Did you bring documents or only talk?

Legal aid offices and some workforce centres help with unemployment hearings at no cost. A call is worth it.