Iphone app wont let me log in

[logan2]

So everytime i hit Log In and manually type in my username and password, I get the message: Login Failed you hve lready created an account with this email address

like  said all im doing is trying to log in to my old account

Also, whenever I try to log in from Facebook it just says "Error 404"

I have deleted and redownloaded the app 3 times and it does not help

Any suggestions?