Ask HN: A while back I lost a couple of BC when Mt. Gox went down, am I SOL?

Yes I'm an idiot, I kept a couple of coin with MtGox rather than moving it to a wallet. When the site was hacked a few years ago it seemed it was lost, then I got some email instructions through the bankruptcy proceedings and submitted my claim, but they came back and said they could find no record.

I have evidence of my original cash transfer (a confirmation email from MtGox) and my username. Does anyone with experience of this know how I should proceed or am I out of options to follow up on this at this point?