I did outbound sales while I was in graduate school, selling Fiat. I rarely had people be rude, and actually sold a few cars. later I did outbound Tm for the NY Times. Oddly I even liked it. Many years later and from time to time I ended out consulting a bit for call centers. It is always a tough job. The Tesla ones have called me. I was polite, tried to be helpful and nearly upgraded my car. I do not mind having called from polite people. I hate robocalls and hate aggressive ones. Tesla is as good at this as is anybody IME, but nobody can do it with well-qualified people who can make much more doing other things.