Sorry to hear about your problems.

Green timber has a moisture content that is higher than 28% and much of the distortion will occur as it initially dries for the first time. Re-hydration can never raise the moisture above 28%, so there is no way you can force the cells in the wood back to their initial green condition. The benefits of twisting the joinery together are almost nil because it will certainly result in an out of square frame as the torqued joints would probably not stand up to forces they are not designed to resist.

Thus, I think that your only hope is to modify the joinery using scribe rule techniques so that it will go together as nearly square as possible.

Sorry I can't think of a better solution, but you are facing the same problem that furniture makers encounter with air-dried timbers.