The quotation has clearly showed depend on your needs, it includes all details about products, includes size, combination, price, you should pay all attention to it. If you need 4pcs set you should tell me I will offer you new quotation and new MOQ, while you didn't tell me you need 4pcs set, your respond has shown we have reach aggreement with size, combination, and price.Also, the payment link I made and the payment we charged is depend on the 3pcs set, So what You paid is 10 sets for 3pcs set.