I'll preface my comments by saying I am rather inexperienced! However, I would not throw the batch away.
Options:
1. Add more sugar and fruit and let it ferment further. Do you have a hydrometer? If not, you should invest $15 in one and watch some videos on YouTube about how to use it...
I think he means buying the juice this September. Many wineries will ship frozen juice by the Bucket. Kind of expensive. Not sure about any local sources for you.
http://www.piwine.com/grapes-juices.html
http://winegrapesdirect.com
If the package ships via airplane, the lower exterior pressure at altitude could also allow the cork to push out, especially if there is any carbonation pushing from the inside....
New wine maker here. Question, can I use Co2 (I have some for force carbonating beer) to fill head-space while aging wine? I know leaving the wine exposed to O2 can lead to problems, but wondering if the O2 in Co2 causes the same issues.
What are the best gases for displacing oxygen in...