Bought a VW brought it in twice both times the tec...

Bought a VW brought it in twice both times the technician said one thing and was not close to issues. I work on my own cars just needed a lead where to start. I needed a new position sensor for air ride they told me a needed a new air shock. Then had oil pressure fault they said I had a leak. Huh I can hear the crank bearings. Technicians are not trained well enough.