Cal. Civ. Code § 1812.215

(a) If a seller uses any untrue or misleading statements to sell or lease a seller assisted marketing plan, or fails to comply with Section 1812.203, or fails to give the disclosure documents or disclose any of the information required by Sections 1812.205 and 1812.206, or the contract does not comply with the requirements of this title, then within one year of the date of the contract at the election of the purchaser upon written notice to the seller, the contract shall be voidable by the purchaser and unenforceable by the seller or his assignee as contrary to public policy and the purchaser shall be entitled to receive from the seller all sums paid to the seller when the purchaser is able to return all equipment, supplies or products delivered by the seller; when such complete return cannot be made, the purchaser shall be entitled to receive from the seller all sums paid to the seller less the fair market value at the time of delivery of the equipment, supplies or products not returned by the purchaser, but delivered by the seller. Upon the receipt of such sums, the purchaser shall make available to the seller at the purchaser’s address or at the places at which they are located at the time the purchaser gives notice pursuant to this section, the products, equipment or supplies received by the purchaser from the seller. Provided, however, if the seller inadvertently has failed to make any of the disclosures required by Section 1812.205 or 1812.206 or the contract inadvertently fails to comply with the requirements of this title, the seller may cure such inadvertent defect by providing the purchaser with the correct disclosure statements or contract if at the time of providing such correct disclosures or contract the seller also informs the purchaser in writing that because of the seller’s error, the purchaser has an additional 15-day period after receipt of the correct disclosures or contract within which to cancel the contract and receive a full return of all moneys paid in exchange for return of whatever equipment, supplies or products the purchaser has. If the purchaser does not cancel the contract within 15 days after receipt of the correct disclosures or contract, he may not in the future exercise his right to void the contract under this section due to such noncompliance with the disclosure or contract requirements of this title.
(b) If a seller fails to deliver the equipment, supplies or product within 30 days of the delivery date stated in the contract, unless such delivery delay is beyond the control of the seller, then at any time prior to delivery or within 30 days after delivery, at the election of the purchaser upon written notice to the seller, the contract shall be voidable by the purchaser and unenforceable by the seller or his assignee as contrary to public policy.
The rights of the purchaser set forth in this section shall be cumulative to all other rights under this title or otherwise.