A China vendor sent me 2 boxes of goods a month ago without a contract or payment of goods. They are now constantly messaging me and calling me on messenger for payment of $2200. They are messaging many mutual customers on Facebook and telling them they sent goods and owe that I owe them. One of those customers (so far) is now threatening to report me too internet crimes and also to post my information in scam groups on Facebook. Do I have any recourse to stop this? The threats of ruining me and demanding I explain myself to this customer is ridiculous in my opinion but a post in the scam groups would be detrimental to me. They have given me a deadline of tonight. Any suggestions or help is appreciated.