I need help I can't purchase the game they say not go trust

What do you mean 'they say not go trust' ? What is the actual error message that you are getting ?

The error message is 'not go thro' ?

If you mean that you are getting a message to contact iTunes Support then you can do so via this link and ask them why the message is appearing (we are fellow users here on these forums) : http://www.apple.com/support/itunes/contact/ - click on Contact iTunes Store Support on the right-hand side of the page, then Purchases, Billing & Redemption