Hello. You can't defend this. Because there is nothing wrong with the merchant, the original responsibility lies with yourself, and you lost the certificate and invoice. So I can only negotiate with the jewelry store.

Look at the mark inside the ring first to identify that the product belongs to the company, and negotiate to change the style.

Second, go to other jewelry stores to investigate or understand the situation and see if other jewelry stores handle similar situations in this way.

Third, sell at a discount.

Fourthly, if the landlord must defend his rights, it is suggested that the landlord check the evidence and relevant legal system and call the hotline 3 15 when he is ready. Because now 3 15 is coming, businesses are very scared. 3 15 After discovering some situations, the punishment will be very serious.

I hope I can help the landlord