recd call from this number. When I answered there was no one there. now BLOCKED.  I called it back anonymously *67 and it said " Thank you for calling. If you want to be put on our DO NOT CALL list, press 1,  or press 2 to leave a message with your phone number and name."
I pressed 1, but then it said that my number was now recorded and entered on the DNC list.     How is that possible when I pressed *67 for anonymous call?