Just discovered KLM changed my flight time from 0600h on 23rd to 1725h on 23rd. Had no notice & it was only bc my parents asked me to check time for ride to airport. So now I arrive at 11pm instead of 11am.

Their customer services are denying any change, despite me screenshotting itinery 2 days ago for my hotel transfer. Looking online the 0600h flight is still available although the connecting flight that I had seat reserved on as per screenshot is now 5x the price. So they've clearly bumped me for a more expensive ticket.

But where do I stand as they sent no confirmation when I booked 3 month ago, so only have the screenshot and evidence that an extra 2 flights are attached to my booking.

Screenshot from 2 days ago saved