Trademark Dispute — 3D printing patented designs

Quick background on my situation — any input appreciated.

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

This involves original creative work over the past 25 months. I do have documentation proving my ownership and timeline.

Should I hire a lawyer for this or try to handle it myself?

I went through almost the exact same thing.

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