Boarded the KTX after booking, but my seat is missing?

This incident occurred on the KTX-Sancheon train bound for Busan, which departed Suseo Station at 9:05 AM today.
A passenger who had booked seat row 14, car 4 via the Korail app reportedly felt bewildered for a while after entering the cabin.
The seats only went up to row 11, and rows 12 through 14 were completely missing.
Korail explained, "A shortage of seats occurred because a different train model was deployed than originally planned."
They stated that they are currently investigating the circumstances regarding why the train model was changed.
Korail announced that among the 31 affected passengers, they would only refund 25% of the original fare to the 6 passengers who had to travel standing up.
They explained that they are not providing a full refund because "the passengers did reach their destination."
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The actual train operating was different from the one booked,
resulting in a lack of physical seats for 31 customers.
Out of these, 6 people had to stand until their destination,
but Korail decided to refund only 25%.
The reason given was "because we transported them to their destination anyway."
LOL LOL LOL LOL LOL LOL LOL LOL