My MS Points on an unused account just went from 90 to 2090 and then to 0!
I got an email about me purchasing 2000 MS points on an old Xbox Live account. I checked and then this came up:
support.xbox.com/contact-us And start an unautherized access investigation.
Did you have to recover your account to the console when you went back to play?
I would also change the password on your account and email.
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