help

Everyone I really Really want to know a way to stop this girl in our society, so I'm a 16 y/o Indian boy, And this girl 15 y/o keeps bothering me and my sister 9 y/o. Due to some issues and some drama she wanted to create about a month ago she put some fake allegations on me, but the overwhelming evidence and my good behavior with people saved me, now to assert dominance, she coincidentally studies at my little sister's tuition and recently, she put some fake news on her too, to create drama, she eventually said that "My sister said that the teacher of the tuition, hits everyone, doesn't teach properly, makes everyone do the same thing, etc., etc." And I. Do. Not. Tolerate. my sister getting bullied, Well long story short since I know a little bit about computers and stuff, Through the society's WhatsApp group I got to know about her father (He's a poor guy pretending to be rich, but uses a old Samsung phone in his day to day life) And I Do have the workplace Gmail, And I can send some 'Concerning' e-mail to her father's workplace on his and his family's behavior (since he screamed at my mom through the phone, and threatened to sue.) (Turns out someone else also works in the same municipal block as him and knows that he is on last warning, one more 'thing' and he's out for good, and he works govt. job, so he's even more cooked) and I have some video evidence of her younger daughter stealing from other kids of her age, The mother scolding a elderly man due to losing control of his dog (even though he barked like once) and also stealing stuff from lost and found, and since the family has drama with the society club, they are even more of a red alert, I have some dummy vapes in my store room that I can plant in her bag and give her some permanent record, and since the elder one (the root cause) also does some modelling/pagenting, If I send one singular gmail to the modelling agency then she will be thrown out immediately since these modelling firms do NOT tolerate any bad history with their models, with all these their careers and life will be destroyed and they will have to change the society and whatever. But Since I am a good guy, I can either forget all of this, tell my sister on how to avoid this lot and educate the masses about them even though half our society knows how trashy people they are, OR, I can ruin their loves beyond imagination, no matter how many times they change their identity, they can't escape. So please I need help since I can't go all physical with a female (especially in India, where women are regarded as goddess)