Got a denial letter for unemployment, what now? - 14 months and counting

I got a denial letter last week saying I left my job voluntarily, but I was let go as a line cook. I have been trying to stay organised about it. 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.