Aliexpress Sent Me A Defective Smartwatch

I purchased a smartwatch from AliExpress eight months ago. After using it for about a month, the screen malfunctioned. The watch still works, but without a visible screen, it's useless. I decided to order a new smartwatch, which arrived recently. However, the new watch came with no screen at all—it's defective from the start. I had already faced issues with the first watch, and now the replacement is also faulty. I'm frustrated and seek guidance on how to resolve this issue. Both watches had screen problems, one after a month of use and the other arriving defective. What should I do next?