The commission shall adopt and enforce rules that:
(1) ensure that customers are protected from deceptive practices employed in obtaining authorizations of service and in the verification of change orders, including negative option marketing, sweepstakes, and contests that cause customers to unknowingly change their telecommunications service provider;
(2) provide for clear, easily understandable identification, in each bill sent to a customer, of all telecommunications service providers submitting charges on the bill;
(3) ensure that every service provider submitting charges on the bill is clearly and easily identified on the bill along with its services, products, and charges;
(4) provide that unauthorized changes in service be remedied at no cost to the customer within a period established by the commission;
(5) require refunds or credits to the customer in the event of an unauthorized change; and
(6) provide for penalties for violations of commission rules adopted under this section, including fines and revocation of certificates or registrations, by this action denying the certificated telecommunications utility the right to provide service in this state, except that the commission may not revoke a certificate of convenience and necessity of a telecommunications utility except as provided by Section 54.008.