Remove all spam backlinks

I would like to hire a person who are capable to remove all spam backlinks for my website called [login to view URL] I have receive this msg from Google Webmaster stated below:- We've detected that some of your site's pages may be using techniques that are outside Google's Webmaster Guidelines. To get hired for this job, kindly pm me a detail list of spam backlinks found on [login to view URL] and propose how long will you take to remove all the spam backlinks found at the website. I will prefer to pay for this project using milestone / weight 20% upfront, 80% once the backlinks is 100% removed and the website is 100% compile with Google's Webmaster Guidelines. Thanks~!