Brand Name / Business Name Conflict — reverse engineering software

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

reverse engineering software. I've been dealing with this for about 8 months now and the situation isn't improving.

This involves content I created over the past 28 months. I do not have documentation proving my ownership and timeline.

What's the typical outcome in situations like this?

I work in this industry and unfortunately this is very common. The good news is that when people actually push back with legal representation, companies usually settle.