No electrical utility shall abandon all or any portion of its service to the public, except for ordinary discontinuance of service for nonpayment of undisputed charges in the usual course of business, unless written application is first made to the Commission for the issuance of a certificate authorizing the same, and until the Commission in its discretion issues such certificate after a public hearing of all parties appearing to the Commission to be interested. In any such case any interested party shall have the right within fifteen days after the final order of the Commission to apply to the Supreme Court for a review thereof, and in such case no such abandonment shall be permitted until such appeal shall be heard and the Supreme Court shall by order permit the same.