I politely told Elvin (Sales) over the phone when ...

I politely told Elvin (Sales) over the phone when he called for a follow up that I have already purchased a vehicle, and no longer need one...he hung up on me. May I recommend in the future simply saying "thank you, I appreciate you letting me know." before scoffing and hanging up the phone. I was going to have see about having some minor service repairs done on another vehicle...but I think Elvin kind-of ruined that for you :/