my site seem banned by google,my product site was in the 1 page of google with so many keywords,and now i just can find my site at 8-9 page of google,and it seem that the backlink in google disppear,so day ago,i submit many rss to the rss site.is it the reason that made my site banned by google?and what shall i do now? and i want to find a good seo web site system for selling product.any suggest?