We are sorry to hear that you have had issues applying your promo code to your order. As stated in the important details of this offer, you must enroll in auto-renewal. If you enrolled in auto-renewal while signing up for Costco, you can reach out to their designated team to assist you with this! You can reach out to them directly here.
However, if they are unable to assist you, please reach out to our Member Support Team at firstname.lastname@example.org.