AliExpress complaint: Order 8144037804066477

1)The customer service agent opened a dispute without asking me or taking my approval.
2) I have chosen standard shipping in the regular mail. They sent the parcel with a private company. I tried to contact this private company several times over a week ago, but I didn’t get a response.
3) The tracking system is not accurate as I did not receive my parcel and they indicated that it had arrived.
4) When I requested a refund, they refused. They asked for documents. Note that my parcels are usually sent to the post office in my city. I contacted all relevant offices and delivery companies, and they all refused to give me a document.
5) Now, i am waiting for the result of the appeal. I am surprised now the seller sent me that the private delivery company told them they sent my package to another location (different than the one i wrote) and they sent me text message to pick it up. And that is not true. They did not send me any messages and they didn’t answer me and i couldn’t reach them from Feb 7 till today.

Why you do not ask them for official documents that they are not liars.