if you don't leave me a voice-mail, then it can't be important

They call on SUnday and do not leave messages

This number calls me all times of the day and evening and on holidays. I sometimes receive multiple calls right after another.   It is apparently a survey from Political Opinions of America and I have left twice, a request to remove my number on their web site.

Called today at 3:25 p.m., didn't leave a message.

Called twice today, no response when I answer - they just hang up.

Did not leave a message.