If the stabilizer told you what was inside the packet, post that info here.
I think if it was sorbate, you're probably out of luck.
There are a few posters on here that have done several of the Island Mist kits, someone will know the answer to your question, so hold off on opening any bottles for now.
Those island mist kits are for wine-cooler type product, and I've heard the whites are much sweeter than the reds. In about the same price range you can get a Winexpert Vintner's Reserve kit - pick a variety you might like - and makes about 30 wine bottles worth. Next time...
Primary - California Common -finally!
Secondary - nothing, back after year plus hiatus
Keg carbing & conditioning - nada
Drinking - store bought: Loose Cannon IPA, Wachusett IPA.
On deck: Trying to decide (beer); wine kit likely (red wine)