Integrated financial My cash now Calling saying I owe from a loan in 2011 I never took out a loan Internet

 For the past month I been getting calls from a mysterious number so I don't answer or I hang up but today I answer the caller and said hello. There was a lady on the phone name Tammy saying I owe $200 for a loan that was took out in 2011. And now it's $465 with interest and fees. The number they call from is 7027818896. She calls me 4-6 times a day. I never took out a loan. This person has my last 4 of my ssn and say they have ID number. She told me I will be put in jail if I don't pay 118.23 by May 5,2017 and a order was sent to cook county to arrest me . Not mind you I was called today saying I owe from 2011. I wasn't even working then. What can I do how can I go about this . She said she is Tammy from integrated financial calling third party for my cash now