You might want to look into adding a call blocker on your system. Chances are, this is a extortion scam operation. You can report them also to the FTC & CFB and talk with your phone service provider.  

https://www.ftccomplaintassistant.gov/#&panel1-1
https://esupport.fcc.gov/ccmsforms/form1088.action
http://www.consumerfinance.gov/complaint/

http://800notes.com/forum/ta-944ec1426a8bcbb/ ... service-attacks
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http://www.clarkhoward.com/news/clark-howard/ ... r-phones/ndF4c/
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http://www.net-security.org/article.php?id=1828
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http://800notes.com/forum/ta-86217073a9c8dad/ ... 077595690349410
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http://www.consumer.ftc.gov/articles/0258-fake-debt-collectors
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http://www.deadiversion.usdoj.gov/pubs/pressreleases/extortion_scam.htm
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http://www.fdcpa.me/fake-process-server-injunction/
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http://800notes.com/forum/ta-9413b3202bc8b6c/ ... net%27s-tactics

How did you get them to stop?  They are calling for a former employee that doesn't even work here anymore.

Man with heavy accent making harrassing calls to my work.  Total Scam!

Recevied several calls from John White with heavy middle eastern accent.  Total SCAM! Tried to get me to send Western Union for face the legal rath of his company. SCAM SCAM SCAM

i have been getting harassing calls from this number and I want that person to be prosecuted. they are running a payday loan scam. please help me. my phone number is 6319020280

Received a call from an unknown number. The person said that they were calling from DFF and had a middle-eastern accent.  I recognized the pitch line and knew right away that it was a scam and hung up. He immediately called back and I rejected the call. A voicemail was left and I listened to the message. The message said to call 313-675-2296 right away or I would be in a big legal mess.