Took my car in for its 35000 service today at Abarth glasgow and brought my new yellow stuff brake pads to be fitted aswell. Sat for around a hour only to be told my two front Brembo calipers are both broken and need to be replaced at 400 each. The pistons have supposedly siezed becuse the pads were down to the metal. When driving it to garge the car was still braking so how can i tell if there teling the truth or not?