Hello Pongpol,
Thank you for contacting Steam Support.
In order to assist you with this issue, we will need you to verify the following information:
-Steam account name associated with the purchase:
-Complete PayPal account holder billing information (name and address):
-Valid daytime phone number including country code (if applicable) or area code:
Please reply to this ticket with this information included in the response. This ticket is not posted publicly and no other users will be able to view this information.
Thank you in advance for your cooperation.