1. The seller filled in the wrong bill number. You can contact the seller and ask him for the correct order number.
The courier has transferred the money. You can contact the seller and ask him to provide the bill transfer number.
The seller didn't deliver the goods, but invented the order number, which was suspected of fraud.
For the first two reasons, it takes 9 days to receive the goods. If the seller confirms the delivery, he can extend the delivery time and wait for a few days. If he loses interest in buying, he can apply for confiscation of the goods and refund.