Comment by firefax

>One alternative is to create a website that outs the company that is harming you in a way that is non-libelous and just tells your story

Ironically this HN post will probably be higher in search results for their name.

OP it looks like the company is French -- maybe try contacting their local elected representative? Open by stating you are not a constituent, but worried about the impact to their district if the dispute is not handled well.

In parallel, reach out to a local library in Paris and state that you're looking for pro-bono trademark law assistance.

I used to work in public policy, and you'd be surprised how one or both of these methods can yield results.