I booked and am confirmed into business on all legs using GUC. I booked direct through Delta several months ago. Flight is LAX-AMS-GOT and return.

There was a schedule change a while back that leaves me with a 7.5hr layover in AMS on my return. My flight GOT-AMS departs at 6:10AM. The KLM app shows a later flight departing at 9:45AM, which would be far preferable to me. I called Delta a couple of weeks ago to ask about changing to the 9:45 flight. I made it very clear that I didn’t want to make any change if it would remove the upgrade to business on the AMS-LAX leg. After looking, the agent offered to switch me to a noon departure from GOT. That would leave me with a connection tighter than I am comfortable with. I asked about the 9:45 flight and as she was looking, she said that flight wouldn’t be flying. It was a Saturday, so she said it would still show up on the app, but had been canceled. I told her not to change anything and ended the call.

now, two weeks later, I can still see the 9:45 flight that I wanted when I search via the KLM app. Should I call KLM…is it better to call Delta when a GUC is involved?