Denied unemployment, how do I appeal?

My claim was denied after 20 weeks of waiting, and the letter says I have a short window to appeal. Thank you in advance. The letter lists a deadline and a hearing process, but it is hard to follow.

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.