cash fast america email scam for money $1875.00 New york internet

 I continue to receive emails stating I owe them $1875.00. I have told them in several emails that they need to stop harassing me and that I don't owe them anything. They threaten to file my social security number with the government to garish my income. Here is there supposed loan number. 2010713-UFC-T1-224, They have threaten to take me to court, but no court case number is listed. I have been contacted numerous times and have asked them to stop, with an email. To no avail, they have not stopped to date.