SOS: 3D printing patented designs

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

3D printing patented designs. I've been dealing with this for about 4 months now and the situation isn't improving.

This involves software/code I developed over the past 33 months. I do not have documentation proving my ownership and timeline.

What are my legal options here? Is it worth pursuing?

So this is more common than people think.

The trap most people fall into is escalating to a supervisor/manager. I'd recommend following the formal complaint procedure instead.

Just want to point out — the statute of limitations might be a factor here. In some states it's as short as 1-2 years. Don't sit on this too long.