i can't pay apps and in-apps orders anymore because ios 7 doesn't support click and buy and i can't answer and change the security questions.
Welcome to the Support Communities!
The article below should help you reset your Apple ID security questions:
Rescue email address and how to reset Apple ID security questions
If you require additional assistance with this, click on the link below for guidance:
Apple ID: Contacting Apple for help with Apple ID account security
iTunes Store: Changing account information
I hope this information helps ....
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