Ok, so first of all, lets talk about one of the last things you mentioned: legacy status and donations. How much does your father donate? Is it just a couple hundred a year? Or is it hundreds of thousands, or millions? If it is a very, very large sum of money you have a good shot, like the rest of the people that buy their way into college. If not, I don't think you have a shot.
Your GPA is quite low for Columbia, and your ACT is also low. Your EC's are interesting, but nothing special enough to make up for your low grades/test scores.
Oh, and being contacted for an interview doesn't mean anything. Getting an interview isn't based on whether you have a good shot or not.