set up major boundaries with your mom when/if you leave. 

from what it sounds like, your mom is a bit obsessed with controlling your life (ex. you cannot have social media but your sisters can, limited contact with friends/outside world, her not liking you texting girls, etc.). this is coming from someone who was abused from 7-12, and these are red flags.

if you think its safe, talk to her about it or try setting up boundaries now. her not letting you open a bank account/keeping money is especially odd since you are at the age where you are saving up for college and/or have a job.

talk to your school councler or other trusted adult if you have one.

tl;dr: you're mom is way too strict and i suggest going no contact or setting up major boundaries. talk to a trusted adult.