I don't think you can. From what I hear it's groups who sell titans to discourage people in duty finder. This makes them go out and try to buy a win. It's stupid I know, but from what I hear a lot of people do it. I haven't played titan in duty finder since my first time to try to familiarize myself with the fight.

I know some people can ruin things like this, but don't let those kind of tactics discourage you into what they're hoping you will do.