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Dear JACUSTOMER - This is obviously a telephone hoax or scam to try to get money. Even if you did owe the money you can't be arrested for a civil debt so the threat of arrest is totally bogus. You did the right thing by reporting this and you probably should also contact your local police department. Telephone harassment is a crime as is fraud so you need to be very careful if anyone calls again. I would not get into a verbal confrontation with them but immediately contact the police. This could also be a case of identity theft so you should make certain to notify your bank and credit card companies of possible fraud.
Private companies cannot get arrest warrants as these would be issued by courts.