Full SEO project

We are in need of an experienced SEO person / company to rank better in Google. The work to be done is for an ecommerce website focussed in the european market. Some SEO work has been already done in the site, with not enough success. We require a proactive and experienced SEO person able to work in all SEO areas, using always? WHITE hat techniques and for a long term basis. To start, we would like to have an economical proposal for one month work, together? with both its action plan for said month and? a long term action plan with realistic objectives to be achieved and timelines. Please ask wathever needed to make a proper estimation. Additional details will be provided to pre-selected coders