Good afternoon. I sent a return to China - a box with shoes. The tracking number is CL126769297RU. I received a message from Chinese customs that you need to provide documents confirming payment. You have specified a phone number for the contact.

Message: 待收件人向海关提交申报材料，【深圳市国际报关行】，电话：0755-26755971.

When I call this phone number, I receive an answer that the dialed number does not exist. Please help with the contact phone number and e-mail, where I can send supporting documents about payment.

Hi, my package sent from USA with tracking CH135268705US
I have received a message from USPS that it is held at suzhou customs, but China post says it hasn't left the US yet. The information is strange and mixed. When USPS notified me of its arrival at suzhou, the Chinese part said it was awaiting inspection, but when I checked again today the message changed, and the last Chinese entry goes back to june 2

How can I provide documents / invoices for customs? I am returning a product purchased through the online store.