Unemployment Benefits Denied in Massachusetts - company not paying final paycheck

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Illustrative scenario prepared by my practice.
For informational purposes only. This is not legal advice. Laws vary by jurisdiction. Consult a qualified attorney for advice specific to your situation.
Hypothetical question

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?