My sister recieves threats and harassment on her social media pages. She is really scared and don't know what to do

This post is long because I need to give you all information. I am sorry. And I am sorry if I made any grammatical mistakes English is not my native language.<br><br>My sister(24) has two Instagram pages. One for clothes and one for beauty. She has around 120k followers on her first page and 4k on second.<br><br>I don't really know when her problems started. Yesterday I recived and email, she sent me her instagram login and password and asked me to delete her pages because people are threatening her and harassing her.<br><br>I started to investigate. I first asked her if she can give me the contact of the people she recieves the threats from so I can report them. She said she is recieving threats from private instagram accounts and she is so stressed out she didn't even see the names. Some of them are claiming they are her friends and some of them are claiming they are from a local executive council and they will ruin her life. My sister has no enemies. I don't know who can do this. I need to help her but I am not even sure what to do. I'll delete her accounts right now and then I'll report all of her recents and then I'll start from scratch and I might need help because the situation is getting really out of hand. I need to protect my sister and I don't really know what to do right now.<br><br>Edit: Thank you all for your help. We reported multiple accounts, we changed all her passwords and we went to the police station to recieve help. Thank you<br><br>Edit: Thank you for all the comments and DMs. My sister is feeling a little better. She is really strong girl and she won't let any of this bring her down. Thank you all<br><br>Edit: Thank you for all the comments and DMs. We are a middle eastern country and let me tell you people in this culture are sick. They don't care about anything. We can't really do anything other than reporting and blocking them. Thank you all again.