Legal Question in Criminal Law in California

Only the police can issue a warrant or DA. If you do get arrested - don't say anything- other than to your public defender.

I obviously don't have enough information to be confident of this, but what you've described sure sounds like a scam. Private companies can't issue arrest warrants or send police officers to enforce their claims. Failing to repay a debt isn't enough to qualify as fraud, and police won't arrest someone for fraud on a mere accusation. Threatening to have someone arrested if they don't pay a debt will usually qualify as attempted extortion. Assuming the company is a collection agency, it would also be a serious violation of the Fair Debt Collection Practices Act

Is this even a real debt? Has anyone contacted you about it before? Did you Google the company's phone number? If so, what did you find?

For all I know, this could be for real. Maybe the debt is legit, and maybe what really happened is that the company complained about you to the police. But I see multiple red flags here.