Cash Advance Officer John Wright 727-865-4360 Harassing phone calls and threathing to take me to jail Florida

I have an  officer by the name of Officer John Wright at 727-865-4360 who keeps harassing me at work. He states he is a state investigator on be half of cash advance and he says that if i do not send him some money that he would call my local ppolice department and file 3 charges against me. When I asked for details he would not give me any details of when I was supposed to have taken out the loan or anything else and he had a thick forgien accent. When I asked to speak to his suppervisor suprise he was forgien to. Finally I made them give me a number supposly to Cash Advance the person who answered was forgien to. They wanted me to get a prepaid credit card that you can get at walmart or cvs and call them after i bought it and they would take the payment. They call my work daily harassing me and the secatary they are very rude and hateful. I just want it to stop. I did not take a loan from them and have my bank statements as proof. They know my name birthdate and last four of my social security number which scares me. I dont want to go to jail and I dont know what to do about this I am a school teacher and I could lose my job over this. Some one please help me so I  know how to handle this.