Whenever it shall appear that an employer is being prejudiced by virtue of the refusal of an injured employee to accept proffered medical and surgical treatment deemed necessary by the physician selected by the employer, or his failure or neglect to comply with the instructions of the physician in charge of the case, the employer is hereby authorized to file a petition with the workmen’s compensation bureau, which is hereby empowered to order proper medical and surgical treatment at the expense of the employer. In the event of refusal or neglect by the employee to comply with this order the bureau shall make such modification in the award contained in the schedule as the evidence produced shall justify.