A. A customer who is crammed or slammed is absolved of liability for charges resulting from the cramming or slamming during the first ninety days after the cramming or slamming appeared on the customer’s telephone bill. Nothing in this subsection affects the local exchange company or other billing agent from collecting credited amounts from the provider that crammed or slammed.

B. The customer may contact his local exchange company, his authorized provider or the unauthorized provider to report a cramming or slamming. The contacted provider shall notify the local exchange company promptly about the customer’s allegation of cramming or slamming.

C. The commission shall promulgate rules that govern procedures for how disputed charges or changes are investigated and paid to the proper provider.