Decisions of the Commission may be reviewed by the court of common pleas upon questions of both law and fact, as herein provided. Within thirty days after the application for a rehearing is denied or, if the application is granted, within thirty days after the rendition of the decision on rehearing the applicant may commence an action in the court of common pleas for Richland County against the Commission as defendant to vacate or set aside any such order of the Commission or enjoin the enforcement thereof on the ground that the authorization, consent, rate or rates, charges, fares, tolls and schedules fixed in such order are insufficient, unreasonable, unjust or unlawful or that any such regulation, practice, act or service fixed in such manner is unreasonable, unjust, insufficient or unlawful.

In any such action a copy of the complaint shall be served with the summons and no order of determination of the Commission reducing any rate, fare, charge or toll shall be in force during the pendency of such action if the utility affected shall execute and file with the clerk of said court a bond undertaking in such sum as the court shall prescribe, and to be approved by the court, conditioned to secure the refund to customers of any sums that may be collected in excess of the rates, fares, charges or tolls that shall be finally adjudged to be lawful and valid.