AliExpress complaint: Fraud seller

I must say that the experience was terrible, first the seller told me that the complete package would not arrive, that articles would be missing, then the package never arrived, but it was reported that it had been delivered, when I informed to the seller about this and asked for information to fill out the forms to the post office the seller refused to give the information, it happens that I was informed by the offices that some sellers give you the shipping number of another order in the same city and so when you reach the other person, it is reported that it was received, it is a type of fraud that I had already heard about but had never experienced, of course aliexpres will not help you because the article is reported as delivered

They never wanted to give information beyond the number of shipments to stop the search for the package.