Hunter Warfield, Inc. Debt Collection Complaint

Hunter Warfield, Inc. Debt collection department,

Credit card Disclosure verification of debt Right to dispute notice not received Minnesota

I called the number - to hunter warfield inc, when I was talking to the collector he mention this company charges interest of 6 %, when I asked why they charged is a collections he told me is what they charge period I try explain if they have any documentation about that he said, I asked for the validation of the debt he was telling me that paper is - that important since account is already in collections I ask anyway.I want informacion why this collections is charging interest. my social # -