Poor workmanship & unresponsive to customer feedback

Took my vehicle in (BMW F30) for annual service & brakes. They decided to skim disks which left the disks warped & damaged wheel bearings. Car had a winding sound when collected. After complains, they insisted it was to do with new brake pads... a week later, they suggested we change wheel bearings (at my cost), which I did. Still the sound persisted..only to have the car back in for a third time (the last two overnight). Not sure what repair were done, apparently it had to do with a schamfer on the rear disk. Finally, two weeks later I found the right stabilizer link damaged. In addition, I sent a note to the owner explaining above, the cost & inconveniences caused. No response nor apology received. I will take this repair elsewhere, despite additional cost to me - prefer the peace of mind. Unfortunate in times when patronage should be salvaged. Please beware, I have reason to believe sub standard knowledge in their practice, shoddy workmanship & poor controls. I will never use Bosch Car Service at Paulshof again.