Had three calls (so far) in one day from these folks. Once I picked up and got an auto-voice asking me to stand by for an important call. After waiting 30 seconds I hung up. Other times I did not answer and they left no message.
Today alone there have been nine calls as of 1:00 PM EST. They never leave a message (my voicemail states callers must do so if they expect a call back), and no one ever speaks when it's picked up. Caller ID does list Kansas. I am on the No Call Registry... I am complaining about the number to them after this.