Answer your phone.
This is the advice a friend of mine who works as an unemployment claims adjudicator would give to people filing unemployment. Oftentimes people are denied unemployment benefits they earned through their employer because they neglect to cooperate in the initial investigation of their claim. An adjudicator is assigned to determine eligibility for unemployment benefits. In short, they talk to you and your employer about why you are no longer employed. If the adjudicator determines that your were fired for intentionally disregarding reasonable work-related expectations of your employer or that you quit without good cause, then you will be found not to be eligible for unemployment benefits. Of course, you can appeal that decision, but that will lead to a delay in you receiving benefits, and it might also mean finding a lawyer to represent you in the appeal hearing.
The problem someone creates for themselves when they don’t talk to the adjudicator is that the adjudicator will only hear the employer’s side of the story. If an employee has documents that would show they did not commit work-related misconduct or that they quit with good cause, they should give those to the adjudicator as well.
Unemployment is stressful. Failing to communicate with people who might be able to help you just makes matters worse for yourself and family.