It shall be the duty of the court in which any such cause shall be pending to require the issue to be made up within twenty days after commencement of the action and to give the same precedence over other civil business. If the court shall find that such rule, regulation, or order is reasonable and just, and that in refusing compliance therewith said railway company is neglecting and omitting the performance of any public duty or obligation, the court shall decree a mandatory and perpetual injunction, compelling obedience to and compliance with such rule, order, or regulation by said railroad company or person, its officers, agents, servants and employees, and may grant such other relief as may be deemed just and proper. All violations of such decree shall render the company, persons, officers, agents, servants and employees who are in any manner instrumental in such violation, guilty of contempt of court, and the court may punish such contempt by a fine not exceeding one thousand dollars for each offense. Such decree shall continue and remain in effect and be enforced until the rule, order, or regulation shall be modified or vacated by the department.