Denied unemployment, how do I appeal? - 4 months and counting

I got a denial letter last week saying I left my job voluntarily, but I was let go as a retail manager. I have read a lot of threads here and could not find my exact situation. My employer's version of events does not match mine, and I have emails that show it.

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