my Site was hacked, Defaced , Plz help how to fix it

my site https://www.cutekool.com and all blog like https://www.cutekool.com/docla or https://www.cutekool.com/runglan was defaced by hacker

they put a deface page show FREE GAZA AND PALESTINE in my site

i can’t visit any page on the site . it’s always show that stupid message every where

i can login to admin page, nothing happend with the admin cp . so i think the site was not redirect . just something wrong inside the code or SQL injection …

The hosting is not the reason . cause i host the another wp site on this shared hosting ( https://vietlawyer.net ). now this web site still works ok .

Can anyone help me to fix this

for sure , will have alot webmaster like me have the same problem and can fix it

Thanks for any idea