AI Training on Copyrighted Data - 3D printing patented designs

I'm in a difficult situation and trying to figure out my next steps.

3D printing patented designs. I've been dealing with this for about 14 months now and the situation isn't improving.

This involves content I created over the past 29 months. I do not have documentation proving my ownership and timeline.

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

I've dealt with this before.

The thing that gets people is filing with the appropriate government agency. I'd recommend gathering evidence first instead.