Voice Chat support help

Not sure where to send this request, so let me know if there is somewhere better to post. My Daughter has started playing marathon with me and we have setup a new Bungie account for her, but even though she is 18, it is restricting her voice chat and not letting it be turned on. It says to go to bungie.net/permissions but there is no permission to update as she is 18 Not sure what to do.