A. Any contract, agreement to purchase, or confirmation executed by a telephonic seller which purports to waive the rights of a purchaser under R.S. 45:831 or 832 shall be against public policy and unenforceable. However, an agreement between a purchaser and a telephonic seller to extend the delivery time of any item to more than thirty days shall be enforceable if such seller has a reasonable basis to expect that he will be unable to ship the item within thirty days and includes provisions for such extension in the confirmation or contract required by R.S. 45:831.

B. Any contract, agreement to purchase, or confirmation executed by a telephonic seller which confers greater rights upon a purchaser than the rights of the purchaser pursuant to R.S. 45:831 or 832 shall only be enforceable and not be in violation of such provisions if all such rights of the purchaser are specifically stated in the confirmation or contract required by R.S. 45:831.

C. The provisions of this Section and R.S. 45:831 and 832 shall not eliminate, reduce, or otherwise restrict any other right of or remedy available to a purchaser.