Urgent guys about my sister

I wasted 2 years jee didn't studied anything and my sister is preparing for jee and she already wasted 11th when she was moving to 11th i said build habit throw you phone do not use it-its your enemy now same phase every telling her please study 10-14hrs cover your syllabus but you know she will study for 1hr in the morning and waste whole day using phone watching tv I am done I will laugh on her when she will fail jee like me bhains ke been nhi bja sakta is sey jadha