Site security issue

Please can you help me to resolve this situation !!!!!
My business is stuffed !!! Google refusing to accept my ads due to this links.
The following links Malicious or unwanted software that need to be removed from my website https://bystonework.com.au

https://bystonework.com.au/wp-content/verbal/hookup-sites-healy/
https://bystonework.com.au/wp-content/verbal/hookup-sites-healy/
https://bystonework.com.au/wp-content/verbal/adult-dating-sites-in-ingeniero-guillermo-n.-juarez/

this issues likely relate to the vulnerability of
access to the site
I have purchased Clean talk software to secure my website from all external access —
such as ftp, wp-content/uploads, etc but unfortunately opposite happened.