Corrupted MXF file - any way to salvage even just the audio?

Hi everyone, first time posting here.

I've have huge problems with a 4K MXF file in Premiere Pro (and elsewhere tbh).

It seems to be corrupted somehow. I can scrub through the interview we shot, so there is clearly information stored there - but everytime I try to export it, it mostly either crashes the whole of Premiere or my computer or whatever other software I've tried in desperation.

I've managed to get the first 1min55s from the interview but then mostly nothing. Clearly there's a glitch/corruption there that is messing with anything trying to read/export it.

However I did once somehow managed to get about 6 minutes of audio (albeit interrupted around the 1.55 mark for a bit). So it's taunting me with the possibility I can salvage more of the audio if possible.

Obviously I'd love to salvage the whole video file but if I can find a way to save just the audio I could work with that because we did shoot a second camera which I can match it with, but it was further away on a 5D so couldn't use the audio from that.

Any help would be gratefully appreciated!

In case useful: File is 47gb (so not easy to send for repair), was shot on C300, let me know if anything else would be helpful.

Thanks

Tom