Harassing phone calls

Recieved a call from a man named John Nelson, with very thick accent. He put his Supervisor, Anthony Johnson, on the phone, upon my repeated request,  demanding $956 to be paid immediately to a business called Cash Advance America for an alleged loan he claimed my wife failed to pay over a year ago. Never had a loan from them, never heard of them. He said if she didn't pay today that another company called American Law Division had a "senior" attorney ready to file suit against her tomorrow in "Oklahoma Court" for over $4000 after attorney's fee's. He had the last four digits of her social security number. He never could furnish our address. He claimed her employer was also being "investigated." He also called my wife at her work place earlier in the day. He told her she had failed to take care of her business and that she would "end up behind the bars."  She continued to ask for a Supervisor and was told by Anthony that he was the Supervisor. She asked for his Supervisor because, while he claimed to be American and had an American name, his accent was so thick she could not understand a word he was saying. He then started talking really quickly and shouting. She just kept shouting back for him to put someone who could speak English on the line and he hung up.  He also told her his company had sent 18 emails that had gone ignored. ROFL! Of course, those types of emails always get deleted!  Not a letter or correspondence one.  Just the emails... which, upon sifting through my past email logs were not found.  My wife was very upset and I told her it was a scam and I'd be able to find something on the internet to prove it. Of course, I have found that proof here. You'll also note, they never put a phone number on their web sites.  I'll have to see if they keep calling before I try to take any legal action, which I doubt would do any good since they are foreigners. I suppose I'll play along and make them mad everytime they call... who know's it might be fun!