Hi Pipat,
Thank you for contacting us. This is Marvin, one of the friendly iTunes Store Support Advisors and I’m here to help.
I understand that you didn’t receive an in-app that you recently purchased. I am sure that you are eager for this purchase to be straightened out; I would want to be able to enjoy something I had paid for as well, and I will do everything I can to assist you with your concerns.
Pipat, after reviewing your case, I've been able to issue you a full refund. Within 10 business days, 0.99 USD should be posted to the payment method used to make the purchase.
If you have future issues with this app, please contact the developer. Here's a link to their website: