Bosch almost costed me my life

I took my car to Bosch service center gezina for breakpads change. It was change but they only tightened only two wheel nuts. I realised after driving more than +-500 km when a funy noise started coming from my front wheel, upon inspection i realised i was driving a car with only 2 nuts tightened.

Anything could have happened. I thank God i am still alive. Poor poor workmanship