What to do if you have a toxic mother?

My mom keeps the blame on me all the time because of my younger siblings. She even told half of my friends that I never help her although I'm always helping her in chores, my friends friends laughed at me because of my mom's lies and blames. Not only that but also she turns off the wifi at home if my younger siblings don't do what she wants and hits me if my younger siblings hit her. It's always my fault and I'm dealing with depression and anxiety rn. I still don't know what to do and even now she blames me for no reason just because she gets bored and she wouldn't take me to my teeth appointments sometimes if my siblings make her angry.
What to do if you have a toxic mother?
Post Opinion