completely remove kingroot when I can't find it I installed kingroot and tried it, I closed it thinking it finished and rebooted my phone.  

After reboot root checker says I have su binary but not root access.  

My problem is I can't find kingroot, not in launcher nor in Settings->apps it doesn't appear anywhere yet when I install it from apk it doesn't say "Install" but "Replace", I tap on replace and wait until it says "application install failed".  

I want to remove it completely But I don't find it , how do I uninstall it ? and if I can't find it then how the packaging tool detects it's installed ?

my phone is sony xperia P with android 4.0.4.  

EDIT :

I have found Kinguser.apk in /system/app not /data/app so That's why I can't find kingroot, it installs itself as system app(and apparently sets some permissions to not allow me to even see it)

So I need root to uninstall it, unfortunatly when I try su in terminal I get this :  

[-] Connection to ui timed out.

So what to do? 

EDIT 2

Ok after I rebooted I can find kingroot in my Settings->apps->all now for some reason, I can disable it but not remove it (because As I said it has installed itself as system app).
Install kingroot again restart your phone, install system app remover application and use it to uninstall kingroot. remover