Hello (Student)Shania Towns,
It's unfortunate to hear that your account has been hacked. In this case, the severity of this has gone beyond what Microsoft can handle. So the first thing you will need to do is to change the password and secure all accounts in the computer, including the affected one if possible. Since it has spread to the computer as you said, you should also disconnect it completely from the Internet. Lastly, please report it to your local authority for the damage done to you.
Thank you for your understanding.