We encourage customers to check their materials before leaving the store. If you received the incorrect item, you may return it in good condition with the receipt, and we will exchange it for the correct item. If the item is no longer needed, and the error is verified through our system, a refund may be issued. In cases where items were entirely missed, please contact us within five days with your receipt number, date, and time of purchase for verification, so we can arrange for pick-up of the forgotten materials or provide a refund. Prompt notification is essential for issue resolution.