I can not buy anything forgot secret answer and changed the answer to the question and I do not change?

Alternatives for Help Resetting Security Questions and/or Rescue Mail

1. If you have a valid rescue email address, then use this procedure:

Rescue email address and how to reset Apple ID security questions.

2. Fill out and submit this form. Select the topic, Account Security. You must

have a Rescue Email to use this option.

3. This is the only option if you do not already have a valid Rescue Email.

These are telephone numbers for contacting Apple Support in your country.

Apple ID- Contacting Apple for help with Apple ID account security. Select

the appropriate country and call. Ask to speak to the Account Security Team.

Note: If you have already forgotten your security questions, then you cannot

set up a rescue email address in order to reset them. You must set up

the rescue email address beforehand.

Your Apple ID: Manage My Apple ID.

Apple ID- All about Apple ID security questions.