Keep getting call s

didnt answer or say anything and has called twice

Answered and said it was a political survey, then hung up.

Spouse answered the phone.  Person requested to speak to me for survey purposes.  Caller was informed that our number was on the national do not call list.  Caller stated they were a research firm and were authorized to call our number.  They would not provide their name, name of their organization or any other details.  They were again informed that this number was on the national do not call list and spouse hung up.

Have continuously called the last week.  When I ansered there was no one there.  Did not leave message.  I finally got someone who said they were a reasearch business and I told them that thid is harassment.  She said she would TRY to take the name off the list.  I told her not to TRY, just do it.