Remove malware/virus from website

My website gives malware/virus alerts on some antivirus software. I tried online and offline scanners and could not find the virus/malware.

I need someone to remove malware/virus from my site.

Here is the report I am getting:

https://www.ipqualityscore.com/threat-feeds/malicious-url-scanner/https%3A%2F%2Fkoinvizyon.com

My maximum budget for this project is 20 USD.