Denied unemployment, how do I appeal? after 5 years as a security officer

My claim was denied after 21 weeks of waiting, and the letter says I have a short window to appeal. I would rather hear the honest version than the polite one. My employer's version of events does not match mine, and I have emails that show it.

File the appeal before the deadline, even if you are unsure. You can gather documents afterwards. That is the one part I would not wait on.