Cash- Connects Threatened me with lawsuit don't know, Nationwide

I was also contacted  by a person claiming to be an attorney for this company & he said I owed for an online loan & I would have to go to Cal to court if I didn't pay back this loan. I live in Il. He coerced me into writing out a letter giving them permission to withdraw funds from my account & fax it to them which I did. Since they called me on a holiday I couldn't check with my bank to see if I had received a loan from them, I didn't remember it & I didn't have my paper statement for the month they were talking about, it was several months previous. The next day I got in touch with my bank got info I needed to prove loan was not received then I wrote them my own letter stating that it would take precedence over any other letter they had received from me & that they were not authorized to touch my bank account I even faxed them a copy of bank statement showing deposits for the month in question as proof that I never received this loan. When I called them to make sure they had received my fax they got very irate with me threatening to subpeana me .The contact names I was given were Alexander Davenport, Senior Atty. Anna Jones, Junior Atty. phone#626-513-0029. The name at Cash Connect was Craig Stevens phone # 916-236-4575. These people all had very thick Middle Eastern accents. I was basically given the same spiel as Sally from Denver . When I asked them for more details & their physical address this guy got irate & hung up on me! I am watching my bank account vry closely to make sure they don't touch it.