Appeal deadline questions after an unemployment denial - 4 weeks in

My claim was denied after 4 weeks of waiting, and the letter says I have a short window to appeal. Any experience at all would help. My employer's version of events does not match mine, and I have emails that show it. Did you bring documents or only talk?

I printed my emails in order and wrote a one-page timeline. The hearing officer kept going back to it.

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.