Pay day loan

In the past two weeks since attempting to find an online pay day loan, which I then changed my mind and did not get, I have gotten at least half a dozen emails from both ACS cash services and cash advance.com threatening to take me to court for delinquent pay day loans that I never got. I have never done business with either of these companies, but one of them has all of my info. How did they do that?  They are also harassing me at work and have even called the principal at the school where I teach and told him they were sending the sheriff to serve me papers or arrest me at school in front of all the kids.