It is unfortunate that you have not received the DVD despite the status showing it's delivered.
For US customers, if for some reasons, you have not received your DVD, please call USPS at 1-800-275-8777 first and provide your tracking number to claim the item.
For Non-US customers check with your local post office. Remember to take your tracking number with you.
Please email us at firstname.lastname@example.org if further action is needed.