United Collection Bureau " Robo-calls '' my home phone number daily attempting to collect a debt from some one else whose former phone number I was likely assigned after a recent move. I have called them back several times and have left messages for them to stop these calls as I am a new person with the debtor 's former number. I even spoke to a gentleman there once and explained to him that the number they have on file is no longer for the person which they are still attempting to reach. Their calls have continued despite my threatening them with legal action.