Black hat search engine optimisation (SEO) refers to controversial SEO methods used to acquire higher Web page search engine rankings. Black hat SEO is often described as a search engine algorithm gaming technique.

Google Disavow links feature will help you to remove spam backlinks....

On the Webmaster Tools home page, click the site you want.
On the Dashboard, click Search Traffic, and then click Links to Your Site.
Under Who links the most, click More.
Click Download more sample links. If you click Download latest links, you'll see dates as well.

Google disavow tool is best tool.

Google Disavow Links tool is right way to remove bad link on your site.

Google’s Disavow Links Tool is one of the best SEO Tool utilizes to save your website from harmful/spam/bad link By removing it from your website.

Google Disavow is the best way to remove your bad links.

Google Disavow is the best tool to remove bad links from the site.