Domain Name Dispute — domain squatter demanding ransom

I'm dealing with a situation and need some guidance.

domain squatter demanding ransom. I've been dealing with this for about 16 weeks now and the situation isn't improving.

I have already done some research online but did not get a clear answer.

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

I was in your shoes about 6 months ago. Lawyer helped me sort it out pretty quick tbh.