As you can see here:
https://www.flightradar24.com/data/f...os759#20c4c404
OS759 tried to land twice before diverting back to VIE. So it's not that they didn't try.
I would let it go. You will most likely make it to your destination on the same day and I personally don't think it's worth the hassle that comes with such a claim, especially give the high chance it won't qualify due to WX. It would be an uphill battle.