Google clearly states that buying backlinks breaches their guidelines and you are at very high risk for penalization. For $5 you are guaranteed to have got yourself a package of automated craplinks and you have made a pretty good case for deserving penalization. You can save yourself by disavowing the links.
Here is Google's guide for disavowing backlinks:
https://support.google.com/webmasters/answer/2648487?hl=en
And here is a guide for using the disavow tool:
https://moz.com/blog/guide-to-googles-disavow-tool
