I recentley downloaded a $50 itunes card and when i try to buy more space on my icloud space on my iphone it says that a unknow error has occured. So I go t my mac and it says that it has bought it. However when I go to my itunes account to check my balance it dose not show where it has been taken out. or where it says how much space i have left it still says my origanial amount. How can i fix this?