It had to be said you should have taken the million but that is all hindsight.
If it was me I would be asking myself did I register the name/domaine properly?
I would challenge the new company and see if they are aware that you had the original name(hopefully properly registered).
If so then you could state that you are taking legal action.
See what they say. If they get huffy find a hungry lawyer and put a cap on how much legal fees you want to put out.
It is worth a shot! Keep us updated...
