@chanhyeong49990 - That was my thinking as well! While not pleasant from a cost perspective I think you’ll need to get the display via the Apple self repair option so you gain access to the paywalled calibration tool which can only be gotten getting the part directly from Apple. the other option which is still a gamble is to locate a used display as that had worked before. But that may fail in the same way.
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If you can write a complaint to either the EU or US consumer protection agencies. As both have the right to repair legislation either coming or enforced.