A file i cannot use

Hi

I did an Ironman...

but during the activity, while running, i pressed the Lap bottom, so the activity started again (i added this option prior to the activity). unfortunately this had happened twice.

so basiclly i have a 10 hours recording with 3 Triathlon complete cycles.

the file wont open in Garmin connect and in Strava it says it is corrupted.

any suggestions?

it is a FIT 1016 KB size.

Tx