If you make a letter of credit, I'm sure you have no problem. Deduct the money according to the discrepancy at most, so that you won't receive any final payment.
According to what you said, this is the re-exported goods returned due to quality problems after the ticket was exported. It is normal that it takes 150 days before and after customs clearance.
Now we still need to contact the foreign party to see if they have received the goods. If they have, we will keep reminding them.
A small number over 2W won't affect your enterprise rating. The key is that you may not get your money back, and foreign countries may delay it, or refuse to pay on the pretext that your first shipment is in breach of contract.
There are two ways for you to get the money back. One is to keep in touch with customers, be emotional and rational, try to impress him and make him feel sorry for you. Here comes the money.
Another way is not to do it at all! Forget the money. When the next order comes, ask him to call directly. If RMB owed by the difference is deducted according to the equivalent quantity of this order, RMB will be sent to him less. Be careful not to let customers find out that you are out of stock. Information must be sent to customers as usual. It is better to deduct the outstanding balance. Of course, this is very dishonest. And easy to go to court. But if he refuses to pay first, you may not suffer. Just get the money back!
Add: I may be too explicit. For harmony, you should ask your boss. Business people have no right to think about how to operate such a big thing. I suggest you ask your leader to see what he thinks. Or let him come forward to help you ask for money.
If he gives up and lets you die, you don't have to worry about whether the enterprise classification is affected, do you?