Refund Policy. Under Helix’s refund policy, you may request a refund of the Geno Next Gen Helix Product purchase price within the period of time specified by Helix from purchase as long as you have not yet received and registered your DNA Collection Kit with Helix. This refund will deduct shipping and handling fees and a cancellation fee of at least $25. You can request a refund by calling National Geographic Store Customer Service at 1-888-557-4450 and providing your order confirmation number. Once you have received and registered your DNA Collection Kit with Helix, your purchase can no longer be refunded. If the purchase is not for your first DNA Product through Helix, it is not subject to refund. This policy is due to the informational nature of many DNA Products. These Terms override the standard National Geographic catalog and online store return policy. Please see Helix’s Refund Policy for more details.