violation of privacy

I get these annoying calls7:30 am and well after 9:00pm from this company Shapiro & Price, stating they are litigation attorneys. although the number listed 877.228.1217 Shapiro & Price that number  is listed on my caller ID as 866.377.5362.  Mr Bob Carson has called over 30 time.  He has threatened my mother, has called my job and threatened me something terribly, using profanity. He stated I owe a company that went out of business and now i am being held responsible for filing fees and court fees well over $4,500.00. And if I would pay today we can settle this matter for $2,000.00.  Can someone share some insight on this issue?  In the meantime perhaps I will go to the media, but in the meantime your feedback would be appreciated. HELP!!