Ford Fiesta 2012: How to get Ford to buy it back?

I've been reading up on the Ford Fiesta and its transmission/gearbox/shudder issue. I've had this replaced three times now. I am nervous to drive my car and waiting for it to start happening for a fourth time. I've read that some people had Ford buy their car back/give their money back. I've made three claims now and they are not offering much and have valued my 2012 car initially at $2000 and now $2500. I've looked after my car and it has low km, about 30,500 km. I believe I should be at least getting value for a car of that is in perfect condition with no problems, as this is not my problem, it's Fords. Why should I be disadvantaged for something they are unable to fix?