For some reason, my girlfriends Walmart app is on my phone, but is linked to my e-mail address. When I tried to set up my own account, it says that e-mail is already linked to an account. I tried deleting and reinstalling the app, but that did not solve t

i downloaded the wal mart app for my i phone a while back. i just recently tried to use it. when it asked me to log in, i realized i did not have a user id or password.i tried to set up one and it gave me an error message stating the e-mail i was using was already linked to an account. i tried uninstalling and reinstalling the app.it did not give me the icon to install the app, but the cloud icon popped up.i selected it and my girlfriends name comes up on my phone with my e-meil attached. i was able to set it up with a different e-mail, but i do not like using that e-mail because im so used to using my hotmail account for everything. what do i have to do to unshare all info between our phones and i-cloud? I WOULD LIKE TO AT LEATS HAVE ONE THING PRIVATE THAT WE DO NOT HAVE TO SHARE!!!

Please helpthanks,

Shredder