You're from Chicago and you think life is fair??
It's brakes, not breaks. Sounds more upscale when you can spell correctly.
Salespeople are allowed to lie to you by law. There is nothing you can do about it except to take your business elsewhere.
When doing a brake job, always replace all the rotors on an e46. They are only designed to last one set of pads. So it did not cost anything when you damaged the rotors. We all replace the rotors each time.
Can you learn to do your own work?