My phone is rooted how can I unroot it plus I have failed to remove Samsung acc

[slimtyger]

How I can unroot my phone and change the Samsung account I want to remove this one because it's not mine 

[Anonymous]

Download the latest stock firmware of your phone then flash it using Odin, just know that you won't be able to use very few samsung apps like s health, samsung pay/samsung wallet and secure folder due to your device being rooted previously

[pinias]

How to download stock firmware