Report the calls to the FTC, FBI and your state's Attorney General.  The most effective way to get these foreign scammers to stop calling is to tell them that the FBI is monitoring and tracing their calls to you.  Other than that, you'll just have to keep hanging up on them or let your calls go to voicemail.

This number keeps calling and telling me to get my lawyer to call because of a payday loan ad that I was going to jail. How can I make him stop calling me..

I received a call from this number also and I have informed the Attorney General of this harrassment.  I hope they will quit calling.  

Yes these people just called me and it was a man with a foreign accent that called. He claimed that he was collecting a debt for a payday loan saying that I had committed fraud. I told him That wasnt true and I asked him to tell me details of this loan. He couldn't give it to me. He wanted me to make arrangements to pay first. I'm do sick of these people calling harassing me. I had the same problem with foreigner calling me from bogus numbers saying I applied for a loan and I'm approved them asked me to send them 199.00 fee first and they will deposit 2500 in my bank account. What can I do about this harassment???!

thanks....I just told them that...

Let your boss and your HR Dept know you're the victim of harassment by off-shore (read Indian) scammers.  If they call back, tell them that they've been reported and the FBI is monitoring all calls they make to you and your workplace.  Do report the calls to the FTC, the FBI, and your state's Attorney General.

this place keep calling me....they also call my job and left a nasty message on my boss answering service....what can I do about this?

This guy has an Indian accent.  He called to say that his company was trying to collect a debt and that I should have my lawyer get in touch with him.

When I called the number back no one answered and there was no voice message.

After I hung up he called m back and I didn't answer.  He kept saying hello, hello and then he hung up.