It shall be unlawful for any telegraph or telephone company or any person in charge of such telegraph or telephone service, or operating or controlling any public telegraph or telephone system or office within this state, in whole or in part, or any employee thereof, to fail or refuse to accept and transmit to its final destination, promptly and by the most expeditious means of communication available between the place of receipt and destination thereof, any message or communication when the same shall be presented for transmission to any regular telegraph or telephone station upon any of its lines, and the regular and usual fees and charges paid, tendered or offered thereon: provided, that when any message or communication is offered which is couched, in whole or in part, in obscene or profane language, nothing in this chapter contained shall be so construed as to compel any telegraph or telephone company, or any person in charge of the same, to transmit such message or communication, and for the purpose of carrying out the provisions of this chapter.