Samsung Galaxy S7edge ,"Touch Wiz isn't responding" message.

Hi everyone,please help me with "TouchWiz isn't responding " error on S7edge,i tried clearing Cache,cleared from hard reset screen,even factory reset my phone and switched off motion gestures.Nothing has worked so far,please help me out,i'm on At&t carrier,i called them up and they said would replace my phone with a refurbished phone which i don't want ,coz i maintained my phone as new till now,it does't has a single scratch on it.

Thank you in advance everyone.