Nardtavud,
Thank you for contacting iTunes Store Customer Support. I understand you were unable to download your purchases of "100 LINE Coin". 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.
Nardtavud, after reviewing your case, I've been able to issue you a full refund. Within 10 business days, 7.96 USD should be posted to the payment method used to make the purchase.