I took my car to service , I needed to change my f...

I took my car to service , I needed to change my front tire.
The service guy was not nice and unprofessional.
He was treading me like a 3rd class citizen because I didn't buy my car at their dealer.
I took my keys back and I took my car to STS tire center they took 30 minutes compared to the 90 minutes that the BMW estimated