Its it Fraud

I receive two different calls from this company. One person stated he was in Florida the other would not tell me where he was calling from. I did pay one the other one told me I paid the wrong one. He told me he would call back. I told him I would be filing a complaint with the local police department. He never called back. Both men had middle eastern accents. Both men were rude and made threats. I called my local police department. I was told if they called again to file a report. WHY THE HELL ARE THEY USING OUT OF COUNTRY COLLECTORS. THEY WERE NOT IN THE USA. THIS COMPANY SHOULD NOT BE ALLOWED TO DO BUSINESS IN OUR COUNTRY. They called me 15 times in one day. I never answered. I waited until the next day.