Since XXXX the XXXX XXXX of XXXX XXXX ' has called my home phone number XXXX times. The robo call stated they are a debt collector and ask for a return call. During this time I have noted XXXX phone numbers. Today I returned their call, the first XXXX numbers are no longer working numbers and the newest one XXXX is a number that does not have a voice mail box set up yet. Due to these robo calsl I have to allow my answering machine to handle all incoming calls. This has the effect of denying me the unrestricted use of my home pone. My home phone number is on the 'Do Not Call ' registry.