Got a denial letter for unemployment, what now?, electrician's helper here

My claim was denied after 15 weeks of waiting, and the letter says I have a short window to appeal. I do not usually post, so bear with me. 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.