Thanks for choosing Apple.
Dear Sittisak,
Welcome to iTunes Store Customer Support. My name is Mary.
I understand that you did not receive credits but still got billed for the purchase. I’d also be concerned if I found myself in your position that's why I'm happy to help you with this.
Sittisak, I have processed a refund of this purchase to ensure that you were not charged for something that you did not receive. In ten business days, a credit of 3.99 USD should be posted to the credit card that appears on the receipt for that purchase. Please