I ordered from Jinhua Wangyuan Packaging Products Co., Ltd. (6 yrs, Zhejiang, China) — they claim to specialize in polymailers and custom packaging. I specifically ordered 2.7 mil thick shipping bags, because the seller themselves told me that’s what I needed.What I received was clearly thinner, not what I paid for, and completely unusable for my business. The bags would tear during normal use.I submitted everything Alibaba asked for:Videos comparing the weight of the bags to a previous correct orderScreenshots where the seller admitted the bags were thinnerThe original confirmed spec showing 2.7 milA full explanation of why the thinner bags are not acceptable for my useDespite all of that, Alibaba sided with the seller, who gave no evidence at all. They told me:“The product has defects, but it may not have reached the level of a full refund.”So they agree the product is wrong — but because the seller says it’s "still usable," I was told I don’t deserve a refund? That’s not protection. That’s nonsense.Then they claimed I “didn’t respond in time” to a refund offer. That is false. I did respond, and I clearly said I would not accept a $200 refund for a large, incorrect order. Instead of continuing the conversation, they closed the case and gave me nothing.I was passed from department to department. No one held the seller accountable. The burden of proof was entirely on me, even though the seller admitted fault and I provided evidence — they did not.I filed a chargeback through my credit card, and that’s the only reason I’m getting justice. Alibaba's Trade Assurance failed me completely.⚠️ Warning to buyers:Do not trust Alibaba to protect you. If you're going to buy, use a credit card so you can file a chargeback. Better yet, cut out Alibaba completely and deal directly with suppliers — at least then you’re not paying a middleman who won’t stand by you.