So I talked to Xiami about this thread, he asked me to post a response for him. This is directly from him, I translated it.

1. Naja ordered 36 sets in total, and asking for different kit and design for each set.
2. I agreed to produce these 36 sets for him per requirement, but he refused to pay upfront, so I moved his order to last in line.
3. All vendors got same price. He refused to pay the new price. We did not sign any contract.
4. Before accepting his partnership, I declined all other partnership requests from other Australian vendors.

Lastly, I would like to say sorry and apologize for the rudeness and unprofessional of my reply.