How to deal with family?

My younger brother died last year, S and since then I’ve felt ostracized by my whole family. The feeling is that the wrong soon died. My dad has taken to ridiculing me in public. These will be comments about my clothes, my politics or even what I do with my house. My parents will talk badly about me to other family members. I don’t know how to approach them, I don’t know if I should have any contact with them period.