Dear อนุพงษ์,
Thank you for contacting iTunes Store Support. My name is Lea and I'd be glad to help you.
I'm very sorry, but we don't provide support in the language you used in your email. We provide support in the following languages:
English
French
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Italian
Japanese
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Simplified Chinese
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Traditional Chinese
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I would be happy to assist you further. If possible, please reply using one of the languages listed above.
Thank you for your understanding.
Sincerely,
Lea
iTunes Store/MacAppStore Customer Support
http://www.apple.com/support/itunes/ww/
Please Note: I work Sunday and Monday; Wednesday and Thursday 8:00 AM - 7:00 PM CST
Thank you for allowing me the opportunity to assist you.