Site hacked by

i am using sydney free theme …
on the tab some text is showing “hacked by chin…” how can i overcome that issue .

my website http://www.usefulthings.pk/

i am using sydney free theme …
on the tab some text is showing “hacked by chin……” how can i overcome that issue .

my website http://www.usefulthings.pk/

Hello,

Please check these links:
https://codex.wordpress.org/FAQ_My_site_was_hacked

Please feel free to ask any other questions that you might have.

Kind Regards, Roman.