The federal fair debt collection practices act places limits on collection efforts of creditors, such as limiting who a creditor can speak to regarding collecting your debt or when they may call you. Your case does not seem to fall under that act. Your phone conversation was in the context of trying to renegotiate your interest rate. This was not a collection call. Even if it was, the statement made to you was probably not actionable- this was not a threat, etc. Now, if this had been a collection call made to your friend regarding you, and the statement was made, you could possibly have an action under the act. Also, I don't think you would have any other legal recourse under tort causes of action such as infliction of emotional distress because the creditor's comments, although ignorant, would not constitute outrageous conduct which caused you emotional harm.