Stained Marble (http://www.lightemprador.com)

Hello,
       I just got some tables with Marble (http://www.lightemprador.com) top( Color: Pink Sakura). The problem is I that paid for them already, and (http://maplered.com) now, after just a month of getting them, all the tops are showing  noticeable stains on them, which seam to be water stains( the table are used for food and (http://maplered.com) beverage display in my hotel). Now that I am stuck with them, and (http://maplered.com) that the vendor who sold them to me admitted that his Marble (http://www.lightemprador.com) provider did not seal them before they sent them to me...
Please help me here, what can I do to take off those water stains, and (http://maplered.com) seal the Marble (http://www.lightemprador.com) tops for future use? is there hope?? otherwise I am in trouble with my boss..
Thank you very much.