A company this big shouldn't be able to get away with it
I'm shocked how bad their complaint / resolution service is. It looks deliberately designed to restrict everything - explanations, evidence, and resolution justifications. My case was pretty clear cut, missing parts. seller accepted and promised to send but didn't (and couldn't give any evidence on request). There was also a delivery date guarantee which even the parts that did arrive didn't meet, and the missing parts are still missing months later than that guarantee date. I request partial refund, seller counters with promise to send again which I decline. Aliexpress counters with $0 refund and no explanation. I appeal with a lot more information by taking screen shots of documents to get around their evidence restrictions, Aliexpress closes the case with $0 refund and again no explanation. I have bought many other products before from their marketplace using the same account, apparently that doesn't help either.