Central Board Of Secondary Education [CBSE] — I am complaining about my 10th board Mark's.

I am not satisfied with my marks school had done partiality between students as my coordinator sir's son is also studying in same class so he got 80% and rest of many students got just 50%, 55%, 60% and I also got only 62%.. and from the play group I never got C and D grade ever but this time I don't know what school had done with our future so pls pay attention on this topic coz it's matter of students future and school can not play like this with us our future is depended on our 10th board Mark's.. pls help students 🙏🙏