They've called my cell phone three times, no answer when I answer and no voicemail. This is clearly an unwanted call and a violation of the do not call registry.
After getting a call and no answer from the other side, I called the number back and waited for the operator. She said they do surveys for car dealerships and said she could remove my number from their call list so I told her to do so. You might want to think about doing the same -- make sure you call during normal business hours. Good luck!