Cashnet USA harrasing and threatening phone calls and impersonating united states federal grant office and F.B.I agents, Internet

I have been receiving phone calls from employees of cashnet USA pretending to be FBI agents saying my local sherrif would come and arrest me the next morning if I didn't give them payment for a loan they claim I got from them. They were calling me from a call center in Asia somewhere , cuz I could hear them saying the same things to others in the background! They started calling me

1st pretending to be calling from the office of US government grants telling me I had been selected to receive a government grant of $7000 all I had to do is pay the processing fees that so happened to b the same amount as what the others claimed I received in the loan they wanted payment on and they kept asking me for my account #. Any1 who lives one US knows u don't pay for a government hence the word GRANT! some1 needs to stop them! They claim I'm a criminal yet they violate our collection laws and many other laws when they try to lie about being officers of the law and I have proof from saving my voicemails!