Monterey Collections Fraud Oceanside California

 Got a collections notification in the mail for an unknown charge. Looked the collections company online and saw many things online about them being a scam. So I never contacted them. I have never missed a payment on anything let alone having a medical bill for over $3000. Noticed a collection added to my credit from them. So I called them about the collection. The lady told me when it was from and to get it resolved I needed an explanation of benefits from my insurance. According to them it was probably billed to my insurance and was never paid. I told her I never saw a bill and she told me they never had to send a bill if it was sent to my insurance. So I called my insurance and they have no claim in that amount from them. The only records they had from that time were paid in full with exception of my co-pay. So I tried to call the collections company again with the information and was put on hold just to end up getting a voicemail.