Moved a partition with gParted and it crashed.?

I scheduled a few moves/resizes. There were 6 operations total. The last two were growing my data partition from 211 GB to 250 GB. It failed at some point during the process and said something about booting to windows and running chkdsk /f. I didn't make it that far as Windows decided to run it's own checkdisk at boot, where it found hundreds of thousands of errors that it decided to fix on its own, mostly things like orphaned files, corrupted sectors, etc. Some of the files are still intact, such as text files and pictures, but more complex files, such as music and pdf, are clearly very corrupt. What can I do to try to undo the damage? This is several years of work that I could potentially lose.