(a) Nothing in this article shall be construed to limit or repeal the application of any state or federal law or regulation regarding telemarketing. In addition, nothing in this article shall be construed to limit the application of any such law or regulation to telecommunications companies which engage in telemarketing.

(b) Nothing in this article shall prohibit a telecommunications company from recovering the cost of conducting investigations and reporting unauthorized changes of a customer's primary local exchange or long distance carrier through tariffed charges or through rates filed with the commission which are applicable to the carrier making such an unauthorized charge.