How To Get Back At My Ex-Best Friend?

Okay, so from age 8 to 14, I was emotionally abused by my best friend, which caused me to develop extreme social anxiety, which caused me to have no friends and get kicked out of my dream school, which essentially ruined my life, and when I politely asked her anonymously if she wanted to talk about why I ended up disconnecting from her, she said, “I’d prefer of you stop trying to talk to me. I’ve moved on and I’d rather not speak to you again, thanks.”

After that, I sobbed for days before I started to become even more angry than before and now I want revenge. She probably has my number blocked, and the only other way to contact her is through her Tumblr again, but she’s probably already cried to her friends at school (she goes to the school she got me kicked out of) about how I accused her of abuse and that I’m even more insane than they thought I was (my social anxiety made me VERY, VERY different from the other kids and they spread rumors about how I was, “dark”), and I don’t want the rumors to get worse.

I need a way to get back at her through her Tumblr anonymously that won’t give away who I am or anything.

I just need closure and I want her to feel sorry for ruining my chance at happiness.