Any consumer may present a claim to the city if he believes that he may have received an incorrect bill. Such claim shall be presented in person at the City Hall before such bill becomes delinquent; provided, that the consumer may make a claim following payment of his bill and his payment shall not prejudice his claim. Such claim shall not exempt the consumer from delinquency penalties if he fails to pay his bill on time. (1976 Code § 14-5-4)