Turkish Airlines Cancelled My Bangkok Flight Over 1-Minute Baggage Delay

On 3 July 2026, at Istanbul Airport, I experienced a serious grievance with my Turkish Airlines flight. I had a ticket for the 15:50 Istanbul–Bangkok flight and had already checked in in advance through the Turkish Airlines mobile application by scanning my passport, even selecting my seat. Despite my e-mail address being registered in the system, I did not receive any notification about any problem with my check-in. I arrived at the airport in time for my flight and went to the baggage drop counter at 14:51 to hand over my suitcase. There I was told that I was 1 minute late and that my ticket would be cancelled. In addition, although I had completed my check-in on the application, the staff claimed that I had no check-in and therefore did not accept my baggage. The staff at the baggage desk repeatedly directed me to different points in the airport and then to the ticket sales office. The employee at the ticket sales office checked and clearly stated that my check-in was in place. When I returned to the baggage drop, I was once again told that I had no check-in and that I was 1 minute late to deliver my baggage, so my baggage could not be accepted. I am absolutely sure that I had completed my check-in, and in fact this is also shown in the document given to me by the airline and on the application screen, of which I have taken screenshots. Despite this, my baggage was not accepted, and using the excuse of a 1-minute delay, both my outbound and return tickets were cancelled. Due to this practice, my hotel reservation at my destination was also wasted and I suffered a financial loss. I paid approximately ₺34,000 for my round-trip ticket about 5 months ago, and the current ticket prices for the same route are now around ₺65,000–70,000, which further increases the extent of my loss. I am a teacher and hold a special (green) passport, I have no reliability issue whatsoever. I did everything required of a passenger, including checking in on time, yet I was first misinformed that I had no check-in and then penalized over a 1-minute delay claim. I request that the relevant staff be checked, the camera and system records be examined in detail to confirm that my delay at baggage drop was only 1 minute, and that my unjustly cancelled tickets and all my losses arising from this situation be fully compensated. I respectfully request that this grievance be resolved as soon as possible.