feeling angry and restricted

so my sister was being rude to my boyfriend in a big groupchat that he runs so he took her out and now my mom is mad at me and took everything away. instagram, snapchat, even facebook. she also made it soni can't text him or call him and now the only thing where I can talk to people is here andbits all cause my sister was being rude and he didnt like it I've read all the texts and screenshots so I know everything that happened and I font understand why I'm not allowed to talk to any of my friends cause of it. anyway just had to get it off my chest

edit: I want to stay anonymous but yes I talked to my mom about it and she was just telling me I should defend family first. he is the only one that I feel safe around and the only person besides my late dad who ever really felt like family