Every contract for discount buying services shall further provide that such contract may be canceled at any time within three days after the date of receipt by the buyer of a copy of the contract by written notice to the seller at the address specified in the contract. If such cancellation is made, all moneys paid pursuant to the contract shall be refunded. Every contract for discount buying services shall be subject to the cancellation privileges and comply with the requirements of Sections 1689.6 and 1689.7 of this code.