Gmail account hacked, security answers changed, recovery email &

Hello,

My daughter's gmail was hacked into and none of the recovery features Google provides works. The security questions were changed to Spanish and the answers changed. The recovery email and phone number does not work. We're having trouble with our iPhone and this email is associated with it. If we can't fix the email then we can't fix the phone. Really need someone's help. I contacted Google twice with no help.