Hello!
Usually resets for PC players are enacted due to boosting, but I've forwarded your info and we'll see what info we can get on this for you.
Can you check to see if Fresh Start was used on your account too? If it was, you'll have a Calling Card that looks like an eraser.
^LM
If you need more help, hit us up on Twitter: @ATVIAssist or on Facebook: https://www.facebook.com/ActivisionAssist