Cannot Reset Security Questions We don't have sufficient information to reset your security questions.but i think its hacked
iPhone 6s Plus, iOS 9.3.5, icloud
Posted on Sep 6, 2016 12:50 AM
Q: Cannot Reset Security Questions We don't have sufficient information to reset your security questions.
See this -- If you forgot the answers to your Apple ID security questions - Apple Support
There is a contact link.
Apple ID Support
Apple ID Support (2)