Updating super user binary and now stuck

Dears

Only 2 hour after receiving my new Tv box

Alfawise H96 Pro Plus 64GB from gearbest

https://m.gearbest.com/tv-box/pp_679360.html?wid=21

I fo stupid thing by download super user app from play store and after run asking to update the binary after reboot

The device stuck on MBOX Logo


Please guide me to the right post to reflash the same image again

As i remember my device came with android version 7.1.2 and kodi is 17 already and no more update required from play store

Plz your help will be appreciated