They have called numerous times and never leave a message.

the number 561-829-2155 with unknown name called at 12:35 pm EST.  I answered.  They are a car warranty place and hung up when i told them i was not going to renew.  They knew the make and model of my vehicle.  They did not identify teh company name so seem suspicious to me.

Who is this person? They called 3 times today! I'll say hi and you hear the background noise and no one ever talks. I'll say hi like ten times and then they hang up. No voice, no message, they just hang up.

This number calls daily,and sometimes u to three times a day.
I have tried not answering at all, and they leave no message. If
we answer, they just hang up.  How can we stop this number from calling ??
Can we put block on phone.

Has called me 10 times in the past 7 days. When I answer their call, they just hang up. When I call back a robot says "Thank you for calling The Auto Department, your call is very important. If you're interested in mechanical breakdown protection for your vehicle, press one. To be placed on the do not call list, press two." When you press two, and this is really strange, it says "Press three to confirm you would like to be placed on the do not call list." After pressing three, it says "Thank you, you have been placed on the do not call list." A different robot says "Thank you, goodbye." I have asked to be placed on this 'do not call list' at least 8 times. Obviously it doesn't work. I tried 561-829-(2154), 2153, 2152, 2151, 2150 and 2156 and haven't been able to figure out what the heck this is.
Read more at http://www.callercenter.com/561-829-2155.html#FzoA8i4O5qsuidhy.99