Every public utility doing business within the Virgin Islands is required to furnish service and facilities reasonably safe and adequate and in all respects just and reasonable. The charge made by any such public utility for any facility or services furnished, or rendered, or to be furnished, or rendered, shall be reasonable, just and nondiscriminatory. Every unjust or unreasonable or discriminatory charge for such facility or service is prohibited and is hereby declared unlawful. Every public utility is hereby required to obey the lawful orders of the Commission.