To reiterate what Leviathan stated, Blizzard only hosts the game on the application. As such, we only assist with installation and patching issues as we’ve highlighted on our sticky post:
Anything outside of the installation and patch, even launching the game, is referred to Activision. We do not have the same data for Call of Duty games like we do for the games that have been developed by Blizzard, because of this, its not something we support. There are a few different options to contact Activision (Website, Community Forums, Twitter).
Blizzard has no hand in console version of the Call of Duty games. If you are also seeing problems on Xbox, then you’ll need to contact Activision support or Microsoft support.