this f*&^ing company calls me INCESSANTLY about updating my Google+ business listing from MULTIPLE different numbers around the country. have tried MANY times to be removed from their list but to no avail. I swear if I ever find out where they are located, I'll end up on the news...
Google Scam. These people use a legal "spoofer" to generate fake phone numbers they call you from.
If you are stupid enough to answer a phone call from a number you don't recognize, even if you select any number to be removed from the list, they will re-sell your number to others, and they will continue calling you. There is nothing you can do about it other than NOT to answer your phone if you don't know who it is. Don't worry - if it's a legitimate caller, they would surely leave a message with their name, the company they are calling from, the reason for the call, etc...