You won't get any help where you are. When you get to your destination, ask if they would be so kind as to print out your PNR (your reservation) and the history of it to show when you checked in. Your history will show that along with other actions such as cancelling your seat and it will all be timestamped. It will also have a record of you attempting to use the kiosk. Chances are more than great they won't give it to you but the reason I say to ask for it is when you write your letter to DL, they may not be able to access your record anymore. It'll be gone forever. With a hardcopy, it will be easier to plead your case.
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