How to deal with rasicm?

Pls help

It’s most definitely not easy to face racism.
Are the people who are acting racist towards you harming you just physically or mentally?
If things are going too far, talk to support groups, adults, or anyone with authority that can help and support you.
I really wish you the best and hope that nothing horrible is going on.

At school it was mentally teachers would treat me unfairly

Have you talked to your parents? Perhaps they can guide you and potentially talk to the headmaster/mistress.
If this feels uncomfortable, there’s always the option to switch schools.