You need to ask Apple to reset your security questions. To do this, click here and pick a method; if that page doesn't list one for your country or you're unable to call, fill out and submit this form.

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If you added a second E-Mail, you can use this article to reset it: If you forgot the answers to your Apple ID security questions - Apple Support

After that, I would do what Niel said and call account security, because they need to verify your identity on the phone, using this article: Contact Apple for help with Apple ID account security - Apple Support