Hello there!
That is a bi dump you have there! I dealt with this kind of problem before.
If the file is not corrupted, I can help you, but I will need to take a look at it.
Basically if I can open it, you'll have you r CSV fast. If it is corrupted, I'll see what I can do, but can't promise the result.
Let me take a swing at it, and if it doesn't work you don't have to pay.
If you can share it somewhere like Google Drive, or Dropbox or any other online storage, I'll have a look.
Let me know if you know when you are ready to share it.
Cheers,
Denis