They may not be interested in doing business as you say but it wont help them if they turn out to be the copyright owners and they take me to court and I can prove to the Judge that I had indeed done my best to contact them... 
It makes no difference if you contacted them or not. They have no obligation to do business with you or to even respond to you.
This is what you seem to fail to understand. They own it, what they do with it is completely up to them, and they owe you nothing.
