Hi johnnydehao,
Welcome to the Sony Community!
Congratulations on your new A6300! We're sorry to hear that you're having issues downloading the PlayMemories Camera apps. We recommend contacting the PlayStation team as they are better equipped to help you out with your PSN account and wallet balance.
For further assistance regarding your concern, please contact the Sony offices/Sony representative offices nearest to your place of residence in Asia Pacific region through http://www.sony-asia.com/countryselector.html?hpid=countryselector:AsiaPacific. Due to proximity, they are in a better position to respond to your questions or concerns.
If my post answers your question, please mark it as "Accept as Solution". Thanks_Mitch