Please speak to AliExpress for all queries about the status of your order. You can contact them here.
When you buy using Splitit 'Pay After Delivery' an authorization (hold) is placed on your card for the purchase amount to guarantee payment. This is not a charge. This is likely what you are seeing on your card, that a authorization was attempted. However, to be sure, contact AliExpress directly for assistance.
To learn more about how PAD works, you can view this article.