Who called from 2072131900

Message that I had taken an online survey for Walmart and they would like to award me a $100 Walmart gift card plus a $25 dollar gas card.
I took no survey, they keep calling though
Has to be a scam

They called my cell numerous times through out the past few weeks but message left

Have called 4 times and no one is there when you answer

Just received 3 calls in a row on my cell, had voicemail with no message....grrrrrrr.

This number calls my cell several times a week, even on the weekends.  Whenever I answer, it is always a prerecorded message from "Sylvia" saying they are calling about a survey I recently did.  I never did any surveys and I never give my cell phone number to anyone other than family, friends, and work, so I have no clue how they got my number.  Very annoying!