Need help to save my footage after a mistake.

Today I have made a foiotage during a book presentation. I have press (MY MISTAKE I HAVE TO SPEAK WITH MY UNCONSCIOUS) the HFR button on my BMPCC4k and now I have footage unusable (the HFR was set to 50) What can I do to save my work?
I use DAVINCI RESOLVE STUDIO 17
HELP ME!!!!

Depending on the target framerate and audio source, could you speed up/slow down the video portion of the footage?
I had a client with BMPCC 6K cameras a few weeks ago who sent me footage that accidentally was recorded with the HFR enabled at 59.94 within 23.98.

Thankfully, the audio recorded normally, so I was able to unlink the footage and speed up the slow-motion to the exact percentage that made it real-time...it did take a bit of experimenting with the right numbers, but it worked. Since I had accurate audio, I was able to just match it up to the audio recording waveform in my case.

Depending on the target framerate and audio source, could you speed up/slow down the video portion of the footage?
I had a client with BMPCC 6K cameras a few weeks ago who sent me footage that accidentally was recorded with the HFR enabled at 59.94 within 23.98.

Thankfully, the audio recorded normally, so I was able to unlink the footage and speed up the slow-motion to the exact percentage that made it real-time...it did take a bit of experimenting with the right numbers, but it worked. Since I had accurate audio, I was able to just match it up to the audio recording waveform in my case.

Yes I have tried this BUT I have 3 footages the 2 short work but the one longer is unpossible to sincronize Damn!!! I'm so stupid!!!