This is one of the standard lies told by collectors. These claims are false and violate the FDCPA. Google that to learn the rules and speak with a lawyer to consider suing these collectors.
This answer is for informational purposes only and is not legal advice regarding your question and does not establish an attorney-client relationship.
No. Don't pay anything without consulting with a consumer attorney. See my article: http://www.ohioconsumerlawyer.com/2012/11/09/jail-time-for-defaulting-on-a-payday-loan/