Appeal deadline questions after an unemployment denial

My claim was denied after 11 weeks of waiting, and the letter says I have a short window to appeal. I am in Boston, in case local advice matters. The letter lists a deadline and a hearing process, but it is hard to follow. 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.

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