Never ever answer a call from someone who blocks their Name or Number or who never leves a message. Or from company you dont know or ever heard from. In time if they never get an answer they will stop calling. Also if you are on the Do Not Call List allways file a complant. That stays on record against them.
I wouldn't have answered this call tonight, but I was anticipating a call from my insurance adjuster. There was dead air on the other end of the phone and I just hung up. It's just annoying