I say you put down the deposit on your favorite out of the two schools you've been accepted to, and decline the other. Then I would make the tough decision. This decision would be, would I go to my top choice with no scholarship over the one I just accepted. If the answer is yes, then I would retake the GMAT by April 1 and KILL IT. Do your absolute best studying that you've ever done, and absolutely destroy the Quant section. Then if you end up killing it, you'll go to your top school and forget about the lesser one, and the deposit you put down. Although the money hurts now, and MBA is expensive, and you will look back at this deposit 10-20-30 years down the line and laugh and say, everything worked out.
If you don't kill the GMAT, and don't get into your top school, then you will have a scholarship and an admit to fall back on! What a rough life

Congrats!