I want to cancel number from iMessage and FaceTime because she hacking her number to my Apple ID

You need to remove the number on your Apple ID. After the change, allow up to 24 hours for the change to sync. Before trying to make the change, sign out of Messages/FaceTime on all devices/computers.

Apple ID - Manage 

If she is hacking your ID, I suggest you change the password.

 Apple ID Password Change.      

 What to do after you change your Apple ID or password - Apple Support     I suggest doing this before you change your Apple ID or password.

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