Every officer, agent or employee of any public utility, who shall willfully neglect or refuse to make and furnish any report required by the Commission for the purposes of this Chapter, or who shall willfully or unlawfully hinder, delay or obstruct the Commission in the discharge of the duties hereby imposed upon it, shall forfeit and pay five hundred dollars ($500.00) for each offense, to be recovered in an action in the name of the State. A delay of 10 days to make and furnish such report shall raise the presumption that the same was willful. (1899, c. 164, s. 18; Rev., s. 1089; C.S., s. 1108; 1933, c. 134, s. 8; 1941, c. 97; 1963, c. 1165, s. 1.)