I've received many of the "senior emergency care" calls; I've stayed on the line and asked to be removed on numerous occasions and informed the person I spoke to that I am on the U.S. government Do Not Call registry (donotcall.gov), yet the calls continue. Also, don't believe the BS you may be told about having opted to receive such calls online. Such professional pests will make up some excuse to try to convince you that you had some prior "business arrangement" with the company that legitimizes such calls.