1. Wait a moment, and then try to dial again. It may be because of rush hour or other reasons that the phone can't be connected. You can try again later.
2. Change the telephone number on the bill of lading. If the phone number on the bill of lading is no longer used or there is an error, you can try to contact with another phone number.
3. Contact through online customer service. You can find online customer service through SF's official website or APP and ask them about the bill of lading.
4. Consult the nearest SF outlet. If there is a SF outlet in your area, you can check the delivery certificate of hairy crabs at the outlet.