FNB atm dispute

I tried withdrawing R500 on the 23rd of December 2019 at an FNB ATM inside Newlands Spar at 07:15. The card was dispensed and when it was suppose to dispense money, the ATM switched off. I phoned and complained then was sent a form to fill, kept calling for an update but nothing till they sent an SMS on the 14th of January 2020 that I should visit the branch.

I've done so and the consultant said I should forward the original mail which I did while at the bank and she said to forward to another division. 3 hours later I'm told the money can't be reversed because it was withdrawn.

I've asked that they check the ATM's camera PLUS the stores camera to confirm my claim and they didn't.

This is nonsense, none was confirmed and now they are saying my claim in invalid. Sies fnb.