Anyone who tells you that they're going to initiate a criminal action in your state for fraud, when you took out a loan and they've already been paid more than the amount of the loan, is blowing smoke. Tell them to go ahead and file their complaint.
(1) In order to file a complaint, they'd have to appear in person before a magistrate where you live and swear to the facts under oath.
(2) Proof of fraud, in either a civil or criminal context, requires evidence of a misrepresentation of material fact by one who knew, AT THE TIME the representation was made, that it was a false statement; that he lied intentionally with the purpose of deceiving another person to the detriment of the latter, and that the other person was in fact deceived and did suffer a legal detriment. So they'd have to prove that at the time you made the loan, you knew you had no intention whatsoever of ever paying it back.
If the bank account information you gave them was correct at the time of the loan, and you authorized them to take money out, and they did so in amounts greater than are authorized under your state law, it wasn't you committing the fraud, it was them. When they took money out of your account in excess of your lawful authorization (amounts greater than allowed by law in your state are not "lawful"), that was wire fraud. Go tell the police; take a copy of the statute and your bank statements with you.