Can't get throwing knives – Modern Combat 3: Fallen Nation Review

Okay so I love this game, been playing it for almost 2 years. I'm a level 90 and I can't get the throwing knives. I have the money but when you click on it it won't give the option to buy. And this applies to all new purchases.
Review by Kxmdicjshdiahx on Modern Combat 3: Fallen Nation.