Not Able To Unroot

[andr1us]

Hi, I have bought a Mi 4c from ebay last year. After not being to able to run some apps due to my phone being rooted I decided to try and unroot it. But unfortunately I haven't managed to do that. I managed to update it to latest stable ROM available on your website, flashed with supersu. Upon booting root checker said that access to root is installed properly. After doing full unroot root checker says access to root is not
installed. Am I missing something? Do you have any advice how i could unroot my phone, thanks.

 

[andr1us]

I have tried running couple apps that require phone to be unrooted and they do not work. Could you suggest an app that requires root access? Tried installing supersu again and it just gives me root undetected

PS. I am new to flashing and rooting so I might be doing something wrong