ACS inc AKA US cash advance payday loan of $945.67 trying to collect this from a check advance that i did not make Internet

 Us cash advance was calling me at work 10 times per day.  then i rec'd an email today stating that if i did not pay $945.67 that united legal investigation bureau has stated 3 serious allegations against you and they are: 1) violation of federal banking regulation 2) collateral check fraud 3) theft by deception.  stated that my ss# had been put on hold by the us government.  and that if id did not pay they would inform my employer and references regarding this issue and law suit will be the next step which will be amounting to $3,932.09 and will be totally levied upon me and that would be excluding attorney charges .  they stated that i would be legall prosecuted in the court house within a couple of days.  i did call the number listed in the email and stated to them to take my name off of their propaganda and that their company had already been identified as fraud thru snopes.com, then they hung up on me.