Remove corrupt file (hacked) and double-check safety features. Update Joomla version and all plugins/thems to latest version. After that temporary password protect the site using .htaccess to restrict to access to yourself.
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11 freelancers estão ofertando em média €39 para esse trabalho
Dear sir, I am very good for Joomla so i can help you fix this. Please message me for more details Thank you and waiting here from you to start right now