If you think you can unlock perks and other things when you reach a certain level, you’re wrong. You have to do challenges upon leveling up. Challenges that won’t count because there’s a glitch so don’t bother completing any challenge because cod won’t count it. It also gives you nonsense challenges “unlock semtex by completing three daily challenges” and one of the daily challenge is something that is LOCKED and you can’t use it. You can extract it from playing zombies i guess but not everyone is a big fan of zombies…