so i have 3 iphones 4. and they all have the same account in the apple store. me and my mom knows the password my sister dosent. so my sister had a friend over and she wanted to download an app but since she dint know the password her friend gave her. her itunes account. she downloaded an free app. well when i found out i tried to change from her friends account to my account and in the progress i did but since i dint know the girls password i had to go back to the homescreen and somehow the account did change back to mine but now everytime i want to download an app in all 3 phones it says please press continue and verify your account. so i did and after i press done it says error cant process your request. and it wont stop doing it. im preety damn pissed. anyone know what i should do?