When the department finds as the result of any investigation or hearing that a common carrier has violated or is violating any of the provisions of law to which it is subject, or that any complainant or other person has sustained damages by reason of such violation, the department shall order such carrier to cease such violation at once and shall fix a time within which it shall pay the amount of damage which has been found due to any person as a result of such violation.
Iowa Code § 327C.27