If what you're saying is true then you absolutely need the support of child protective services. Please don't think that any of this is your fault or that this is normal. It's not.

There are probably people in your area who can give you advice on how to get help. Either at your school (ask teachers who could be trustworthy) or figure out if there is some kind of place to go for victims of abuse. You shouldn't have to put up with this. Seriously.