Iphone locked
my friend bought me iphone but instead of buying it unlocked he bought it locked before he fly to egypt he activated it and he knew that he made mistake so he paid 120 $ to unlock it from a store near from the airport in 5/4/2014 and they told them that it will be unlocked it 3-4 days and my iphone still locked untill this moment and when i tried to restore now it says SIM Not valid .. i can't even use it in camera , recording anything .. any help
ps : i can't call at&t cause i'm horrble at speaking english
and i can't chat with them cause i don't have wireless number
any help ? :s
iPhone 5s, iOS 7.1