Just to warn forum members of this people claiming to be AliExpress sellers. I am not sure what they are really up to since I never even ask their store url like many I saw here. I have discussed with AliExpress support a number of times about dispute and refunds. They explained repeatedly that once you buy in the normal procedure like automatic order of dropshippers, the money you pay will be kept by AliExpress. This will be released to the sellers only when the order is received and no dispute submitted during the dispute period specified. This is the AliExpress buyer protection. In the event that the buyer submitted a dispute, you will be refunded by AliExpress, even if the seller do not agree.
That is if you order in AliExpress. But if you deal and order directly to the sellers, which I suspect this sellers are convincing you, you are on your own against the seller and at their mercy. When you ask help from AliExpress support, the first thing they ask is the order number. If you ordered directly to the sellers, there is no order number, they will not help you. You will be lucky if you can even talk to a human support. This is just a warning.