Can’t play! Please update app! – Call of Duty: Zombies Review

I have an iPhone 7 Plus and it uses iOS 11.3 and the app is not updated enough for me to play. I love this app it’s my favorite i would really appreciate it if you could fix it for me. Thank you very much ( it won’t even load btw)
Review by Gamerchick69686868696869 on Call of Duty: Zombies.