Brakes have failed on three occasions. That is total failure.
Last failure was the steering. It went its own way causing a collision.
We have two Kalos cars bought within one week of each other. One has quirky irritations, but is OK in general. The newer one has brakes and steering issues. It is currently being repaired in a body shop because of the last fault.
Issues with passenger compartment integrity in a crash (check out crash ratings) should make you quite shy about driving with anything wrong with brakes and steering. You should go for your money back.