By all means! Contact whomever handled you original booking. Sometimes they may not know about the new upgrade. I would do that as soon as possible, in case the offer is withdrawn. You have nothing to loose, and maybe something to gain. Give it a try. Good luck to you.
Internet, Expedia and Yahoo list the same prices. My TA first booked us at the same rates listed on the websites. The Carnival site only lists rates for last minute cruises. Should I keep quiet and hope for an upgrade? Should my TA get me the better cabin?What are the rules??
It's really a matter of calling your travel agent and hoping they will help. Good luck.
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