Keg refermentation watermelon HELP!!!!!

I made a watermelon wheat (WW) recently, poor efficiency so I boiled down to get close to my .054, Once it was done ferming I had 3.5 gallons, so I put in a keg(cold crashed prior to moving) on top of watermelon juice.

Issue: I put my normal 1 gallon of wah-wah juice in and now it is like a sweet wah wah wine! 4th july party in a week and I gotta get some flavor out.

Question 1: it is carbed up now, can I let it warm, bleed off co2 and hope it kicks in again, maybe get 3-4 days of ferming to eat some of that juice?

Q2: Could i repitch a champagne yeast and help it burn some off, then cold crash and carb, or am I basically screwed because it already is holding co2 in suspension?

Q3: maybe dry hop or add lime juice to cut the sweetness?

Any and all help is appreciated

Thanks

I suggest getting it really really cold then drinking it handstand style...seriously tho..try getting it to room temp and pitching some champagne or white wine yeast

something about a silk purse and a sow's ear....

So you want to warm, uncarb, referment, chill and recarb all in a week? I'd suggest picking up some brew, a week is really short time to fit all that in.