I'm so sorry to know about this Jacky. You may be a victim of Malware/virus attack. It was confirmed that they cause this incident to happen. Check out this Solution article to know more about it and for ways on how you can make your account and your computer more secure.
For us to recover your lost messages and contacts, give us the following info:
- Your Hotmail account
- At least 3 of the missing email addresses from your account
For your lost contacts in Messenger, you have to contact the Windows Live Messenger Support Team directly. Here's how:
Go to this Solution article then click the link for Windows Live Messenger.
After you're directed to their support page, follow these steps:
1. Choose the version of your Messenger
2. On the new page, click any topic at the left side of the page
3. Click "Get more help" located at the bottom right part of the page
4. Click "Get support."
5. Complete the form then click "Submit."
FYI I moved your post to the Lost or Deleted Emails forum.