The lack of logistics updates may be due to issues during transportation or a logistics service provider's system failure. First, contact the seller to see if they have received any feedback from the logistics provider. If the seller is also unable to determine the issue, try contacting the logistics service provider's customer service, providing the order number and tracking number, and ask them to assist with the inquiry. If the logistics provider still cannot provide useful information, you may need the seller to apply for a refund or reship the item for you.