Central Board Of Secondary Education [CBSE] — of school change time and coaching

Address:

Biratnagar 13 higway road near birat eye hospital, 56613

I am a dav student and i want to complain about change of time in my school our school had started coaching from 6morning to 6:30 evening and it cost around 7500 and fodd wich is rice and some daal my complation is that if we didnt get time for own stidies how will we score marks.
And if student didnt do they tell we dont you will pass or fail they said we wont take any responsiblity.