Managing personal Outlook.com account settings, security, and privacy
Sorry. The link is https://support.microsoft.com/en-us/contactus. I mistyped.
Thanks a lot, i had tried push my luck, but it doesn't work. I stuck at the very first step. In order to view activity, i needed to solve the phone number issued. While the phone number is already changed to the hacker's phone number, I have submitted request to changed back, but it seems need to wait for a month!!!....
I don't understand why the hacker can changed my phone number instantly .... while the owner needed a month for the number to change back.