getting refund from apple "in-app purchased"

Recently I bought a game from app store for my kid to play with. After the purchased I forgot to remove my credit card number from Itune - I usually do this in all my online purchase. After few days I got SMS alert from maybank credit card that I used my card to make few in-app purchased from app store. Luckly maybank send me the alert. I am a bit furious !!! the total amounted to about USD100. I am not sure how this could happen. After some investigation my kid told me that while playing with the game he clicked on some buttons that caused some transaction "in-app purchased". This is not good and it is not fair for consumers. I want to get refund from apple. So what can we do:

WE HAVE 3 OPTIONS:
Option 1:
You can go to your itune and look for your purchased history. this is like try to find needle in haystack.

Option 2:
Email apple support: go to this page http://www.apple.com/support/itunes/contact/


Option 3:
1. Wait for the receipt for your purchased from apple through email.
login to icloud email. https://www.icloud.com/#mail

2. Look for the receipt

3. open the email and click on the "Report a problem"

4.a It will bring you to a Itune webpage. Please login using your icloud login info.

4.b.  And choose a problem category: "I didn't unauthorized This Purchase" with explanation your kid click on the purchase button without your consent. 

5. Apple will record the problem and email the notification:

6. In couple of days they will email you. Apple will be glad to refund you back for unintentional purchased.