To delete an account on AliExpress, you need to enter into it by entering your login and password, then open “Profile Settings” and on the left in the menu select “Change Settings”.
In the window that opens, click “Deactivate Account”.
Then enter your email in the line “Enter your username:”, type “Deactivate my account” below, then specify the reason for deactivation and click “Deactivate my account”.
After that, the account will be inactive, but you can reactivate it if you want.