I answered said hello and they hung up.... Adding Another number on the blocked call list

Answered, the person stated they were from GE water treatment services and that they had "spoken to us back a few months ago and they wanted to follow up" I cut him off and told him that he never spoke to me, and that I never requested water treatment services and to remove me from his calling list. He immediately sighed in disgust and said "How rude can you be?" I hung up on him.

This phone #: 480-370-9673 is calling me every day of the week. Hanging up when I answer. Even yesterday, which was Sunday. I want these calls to stop immediately.

They call everyday and don't leave a message, I called the number back and it does not accept incoming calls. WTF?