Bosch services and Chocned partnership is flawed

Bosch services and Chocned partnership is flawed. Caused me to have a huge unexpected expense. Have bought my car through Chocned that insisted I should do the car inspection service at Bosch Services against my preference of BMW themselves (as they would now their own cars the best) After receiving the car it had a noise that I went to BMW to say what it may be. They indicated of less than 1min with the car that it is because there is play on the steering rack and a replacement would cost R27000+. I would not have bought the car at the price I did if Bosch have brought this under my attention. Discussed with Chocned and they have arranged another service with Bosch to inspect and indicated that they use Bosch specifically as they would take responsibility other than BMW service inspection would do. After Bosch also picked up the issue with second inspection they are not taking any responsibility.