Marketing Expert

I am looking for a marketing expert
My site : sell web design and seo services
My site: premiumqualitytraffic
I need a person know where should to market my service ? and close sale with customer by phone or email
I will pay 20$ for per sale completed with all our services

Example : if you close 10 sale a day, you got 200$ a day , 50 sale a day you got 2000$ a day

So I need you know where to promote my site effective?