Cannot buy apps from the App Store b/c old owners icloud email still shows

I just bought a used iPhone 4S.. I am trying to download apps and CANNOT because the previous owners iCloud email still pops up and wants me to put in her password when I have made a new icloud account, deleted her old account but it still won't show my iCloud email. I am getting seriously frustrated. PLEASE HELP

If you created a new ID, you cannot update the apps that you bought with that ID by using the new ID. Apps are always tied to the ID that you used to buy them with. You will have to continue to use the old ID and password for those apps. If you changed your ID - and there is a difference - go to...
http://www.andrioidappspc.com/whatsapp-para-for-pc-download/