Form e certificate of origin shows that mainland companies c

There was a customer from Vietnam who ordered two containers of goods. For the first counter, the customs clearance information is made with the head of Hong Kong offshore company, and the third party invoking is checked on form E. At present, the second cabinet uses the head of our Hangzhou company for customs clearance information. The form e certificate of origin is not checked by third party invoking. The goods have arrived at the port. The customer feedback that the customs does not accept the form e certificate of origin, saying that the form e certificate of origin does not check the third party invoking, but our agent says form E. only offshore companies can check the 13th place of origin. As we are a Hangzhou company and belong to a mainland company, we can't check third party bidding. What should we do?