Toxic Parents I guess?

I know I’m still pretty young but my parents cause me a lot of problems. It’s mostly my mom. My mother thinks that my depression does not need to be taken care even though the doctor told her to get me help. Every time I ask for help, she threatens to put me into a mental hospital. I self harm myself and I want it to stop but I just have this urge to whenever a problem comes up? I tried cutting them off and running away but my mom told me to come back. And when I came back, she slapped me. I really don’t know what to do anymore, please help.