Complaint Review: Mediation Processing Services Jacksonville Florida

I was contacted 1/09/2018 via voicemail that I needed to call Mediation Processing Services at 1-904-550-1333 to verify my address for a parcel that needed to be delivered. I contacted this number back and they asked for me by my previous married name. The woman who called herself my "Case Worker" would only identify herself as Ms. Jackson. She stated that I owed Cash Advance over $1000 for a payday loan that I had taken out "many years ago". She threatened to take me to court and to come after my belongings if I did not make a payment immediatley. I informed her that I did not owe any amount to Cash Advance and she continued to harrass me demanding a payment. She offered to settle for $300 if I gave her my credit card information today. She stated that this company has sent me multiple certified letters without any response.  She gave me an email address to contact to have an e-signed document sent to me to allow payment arrangements. This email address was to another woman that calls her self Ms. Williams. This email address is twilliams@mediationprocessing.net, if anyone needs this for future reference. I have never recieved any letters and I have never recieved any calls. I asked her to send my balance along with any dates and other information that would clarify what I owe and to who via mail, she told me that this was no longer an option since I have not contacted them before now. She refused to send me any type of documentation. While I was on this phone call I researched their telephone number and was immediatley taken to a scam website with multiple complaints similar to mine. I informed her I would not be making any payments and for her to remove me from the call list, or to send me the documentation as I requested. She continued to harrass me and threaten me along with raising her voice at me. She said I will be sent to the Judge for further action. I ended the call and blocked her number.