Central Board Of Secondary Education [CBSE] — Complain of maths teacher

I am the student of class 11th from school mount litera zee school, jhansi pin code:-284003.
I am very disappointed with my maths teacher he is not even teaches maths properly and in exams he gives promise that he will give questions only from ncert but in the exam he gives question out of ncert then students not able to do that and they fail, and in online exam online mcqs he give 40 question and the questions having proper 1-2 page solution and time is limited that is 45min and that 40 question in the given time is not possible to do so please take a action. And his method of checking is not according to cbse norms he says that if answer is correct then only marks will be provided and no marks will be provided for solutions so this is not correct and he also say new students to join his coaching so that they can get more marks.Not me but there are many students those who have complaint about him but they didn't complaint about him because if he get that him or her gas complaint about him he will take revenge from those in exams.
So this is humble request to take a serious action against him.
Thanking you
Yours faithfully
Student of mount litera zee school, Jhansi