Central Board Of Secondary Education [CBSE] — Rude/careless teachers taking online classes

I'm a student from D.A.V Senior Secondary School, mogappair, Chennai-50. There's a hindi teacher named Padmaja Naidu, and she only benefits those with their mother tongue as Hindi. (We're currently taking online classes) She only asks them to volunteer. Hence, the other students aren't able to learn the language better. I have experienced this "step-mother" crap, She called on a North Indian student and he wasn't able to turn on his video. She told him to do his reading compression anyways. But when it was my turn I wasn't able to turn on my video either. That North Indian boy whom I mentioned unmuted and we started to hear some noices. And It happened when I was reading, she didn't even care to mute that boy and tell me to read again. Simply she said "Ah, I know these sorts you never turn on your video or unmute, but when you do, you only disturb the class.". And she gave me 0 marks for internals, while that boy got full marks for not turning on the video and making noises in other student's turn. I can't believe teachers like this exist. I would really appreciate if the school was contacted and the teacher should be inspected.