I can't believe 409A valuation for option grants is even legal

English isn't my first language so bear with me. I'm dealing with a situation and need some guidance.

409A valuation for option grants. I've been dealing with this for about 15 weeks now and the situation isn't improving.

I have already consulted briefly with a lawyer but the other party is not cooperating.

Do I have a strong case? What should my next steps be?

This is depressingly common.

What worked for me was hiring an attorney to send the initial letter. It took 2-4 months but was worth it.

This happened to me too. Have you tried filing a complaint with the relevant agency? In my case they investigated and it got resolved without needing a lawyer.