My name is ***** ***** I am a US lawyer.
This question is one you posted 6 months ago. Are you still in need of an answer or were you just questioning the billing?
Unfortunately, while you could report this matter to the LA police, chances are they will not be much interested in it. In order for a prosecutor to get a conviction for a fraud/theft offense, the state would have to prove beyond a reasonable doubt that at the time that this company entered into an agreement with you, they never intended to pay you back. Under these circumstances, proving that would be very difficult.
On the other hand, in civil court, the burden of proof would favor you, All you would have to do would be to demonstrate by a preponderance of the evidence that this company had a contract with you and that they breached the terms of their contract by failing to return the rest of your money.
So, yes, this would almost certainly be looked upon as a civil case for breach of contract and conversion. If you were to sue in the States, you'd need a California lawyer and could find a civil litigator by contacting the California State Bar Association's Lawyer Referral Service
. They charge a fee of around $50, which includes a one-time free half hour consultation with the lawyer, which you could have on the telephone so that you would not have to fly to the States just to meet the lawyer.