But here are the key points:

1. Next time be sure to engage 3rd party inspection. It is not expensive and helps avoid these problems. You can find recommended agents here.

2. Also, make sure to have a good contract that explains what will happen in the event of quality problems. You can find tips about contract at this blog post: A small buyer placing orders with Chinese Suppliers: contracts, travel, and other issues

3. For your current problem order, you have two optionsa) Engage a 3rd party negotiator to step in and try to salvage the relationshipb) If the relationship is behind repair, hire a local lawyer to send a demand letter.

Demand letter and mediators are explained in this helpful blog post: Resolving a dispute: Demand letters and legal options

If you would like to be introduced to any of those third parties and/or if you need help finding a better supplier, just let me know. I am happy to make the recommendations for you.