Admin support

I have three spreadsheets of contacts which need merging/consolidating. But one of the sheets is from my LinkedIn, and is missing the place of work, job title etc. The project is to first extract the LinkedIn data from Linked in to populate the additional columns and then merge all three sheets under the same headings. The deliverable will be one single, clean, usable worksheet for subsequent mailshots. If this works out we can talk about the mail shot work too.