receiving harrassing czlls threatening to lock me up

Receiving calls from the same number.  Blocked them on my cell phone, now they are calling my job, repeatedly.  Even went so far as to ask for my managers name.  I wouldn't give it to him so he fakes with another like they are going to find out on their own who my manager is and call them directly.  He calls right back.

They been calling me for the last two weeks and they don't start

The gental man is calling my work and saying that I have comitted fradulant charges against my company but will not revile his name or company name. He just damands money or I will go to jail! It is obvioux this is a scam and my boss is furious and told me to make him stop calling. The man called 5 times in the last five minutes arguing with me demanding to speek with my boss. How do we take care of this and make him stop calling?

Calls up to say there is a court judgment or something (Very hard to understand, painfully thick Indian accent) but gives no additional information.  Called and left a message at one point (we normally ignore the out of state calls), then called back half an hour later again.