Upgrade from soda beverage package to alcohol package once on ship??

jeb2006

Well-Known Member
I have purchased a soda package online for a Feb. cruise on Harmony of the Seas.
Will they let me upgrade to the alcohol package once on the ship and just pay the difference?
Is this possible?
I did NOT purchase the alcohol package online due to the stupid requirement of having to purchase that for ALL in the stateroom, though the one I'm with don't drink!
 

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