Unemployment Benefits Denied in Massachusetts - company not paying final paycheck

Looking for advice on a legal issue in Massachusetts. Here's what happened.

company not paying final paycheck. I've been dealing with this for about 11 weeks now and the situation isn't improving.

I have worked at this company for 10 years. My position is non-exempt and I do not have a written employment agreement beyond the standard offer letter.

Has anyone been through something similar? What worked for you?

I've dealt with this before.

In my case, it took about 1-3 months to resolve. The key was escalating to a supervisor/manager.

I've dealt with this before.

What worked for me was having everything documented. It took 3-6 months but was worth it.