Hi @ Jasper Zhang,
Welcome to Microsoft Q&A forum.
I’m sorry to hear that your account has been hacked. That must be very frustrating and stressful.
However, Exchange online is mainly focused on the technical questions about the configuration and administration of Exchange Online.
Regarding your personal account being hacked, I found the following relevant links that I hope them will help you!
How to recover a hacked or compromised Microsoft account - Microsoft Support
My Outlook.com account has been hacked - Microsoft Support
In addition, about personal accounts outlook.com has their own forum, here you can post questions: Results in Outlook - Microsoft Community
Thanks for your understanding and patience!
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