Indian scammers. They call constantly from different numbers and change the caller ID daily. They use such scams as you have been approved for an auto loan, your computer has been hacked and they are from microsoft, or they will state you have a payday loan and will go to jail if you do not pay up right there. ALL SCAMS. It does no good what you say to them as they will just keep calling. Heck they call for my wife all the time and even when I tell them she died a few weeks back they will call back in a couple hours.

Consider getting a call blocking device or phone.. You can google them and many are around $50.00 or so.If its a cell phone, some already have call blocking, if not, there are free apps on the web that will work for some. You can google this. If you have a smart phone, there is a free app called call control. Iphones appear to have apps also. Another one is called Mr. Number.

Report your callers here, not just to the DNC alone:

https://www.ftccomplaintassistant.gov/#&panel1-1
https://esupport.fcc.gov/ccmsforms/form1088.action
https://complaints.donotcall.gov/complaint/complaintcheck.aspx?panel=2

By State DNC lists:
http://800notes.com/res/DoNotCall.aspx

FCC Abandoned Calls Complaint form:
http://www.fcc.gov/cgb/consumerfacts/1088D-R.pdf
email:  fccinfo@fcc.gov

To file complaints on Foreign company's:
eConsumer.gov: Report Your Complaint
E-mail: econsumerwb@ftc.gov