Someone hacked my acct. I came home one day and MS emailed me thanking me for my recent purchase of 10k MS points 2 weeks ago. WTF

I checked my acct and sure enough, someone had bought me 10k MS point using my billing info. MS locked my acct down while they investigated. I got a full refund and finally, got back online yesterday.

Whuh??? What happened? Your acct back?