Its a 2006 car sold as a p/x to clear you are not going to have much luck getting Ford to work on it for free its nothing to do with then anymore, and the warranty sold with the car will only cover so much.

Find a good auto spark and get it fixed yourself.

Those Fiesta's can have ecu problems I've had a couple repaired but never heard of flashing hazards sounds more like an aftermarket alarm problem.