First of all, don't distill the wine if it's sulfated. The product will have an unpleasant aftertaste that you won't be able to avoid. Believe me, I know what I'm talking about.
Sangria is a good option, if you enjoy that kind of stuff. Or frozen granita, if you have the time to put into it.
I had a 6 gal carboy like that three years ago and I managed to fix it. I messed up the acid in the beginning, than corrected it 3 times up and down after AF and it just didn't taste right no matter what I did. So I fermented a batch of elderberry wine from concentrate and mixed it with the problem wine. It was messy and left a greasy scum on everything it touched, but I didn't care. After another year of aging the 2 wines together I had 60 bottles of something unique and delicious. Many of my friends begged for another bottle and it was gone in no time. To this day they still mention it and ask me when I plan to make more of it...