A person required to pay the fees set forth in this article who disagrees with the calculation or applicability of the fee may petition the department for a hearing by submitting a petition setting forth the fee which is challenged, the grounds on which relief is sought, and the total amount of the fee due. The petition and the fee must be received by the department no later than thirty days after the due date. The hearing must be conducted in accordance with contested case provisions set forth in the Administrative Procedures Act and department regulations. If it is finally determined that the amount in dispute was improperly assessed, the department shall return the amount determined to be improperly assessed with interest not to exceed the statutory rate.