Assuming in a galaxy far far away there is a type 2 civilization (currently on the verge of transitioning to type 3).

Their scientists predicted that the star (red giant) they are orbiting is going supernova probably within a couple of years (a decade maximum), they won't be able to evaluate everybody in time.

My question is how can they stop the supernova? If it can't be put out in time how can they survive this ordeal?