If you call back, as suggested by the shill for the fraud, your number will be confirmed as live and added to a suckers list for repeated future calls from this fraud.
This is a message board for people who receive unknown/spam/scam calls - you will have to contact the people who are calling you and tell them to stop calling you. This board cannot do that for you.
These scammers were caling me 2 and 3 times a week. I never answered the phone because I didn't recognize the number or the caller i.d.'s, Then I got a program called Phone Tray, and now their calls are zapped automatically, I highly recommend this program as a means of dealing with all these calls. It's easy to use, inexpensive and works!