Refused my repier

I own a Samsung S23 mobile phone. One night, the phone automatically installed a software update at midnight, and after this update a green line appeared visible on the screen. I took the phone to the Samsung service center and raised this issue. The service center staff told me that the repair would be done free of cost, and I handed over the phone to them for repair on this assurance. I am filing this complaint because the screen defect occurred due to an automatic software update pushed by Samsung and not due to any mishandling on my part. I request Samsung to repair or replace the affected screen free of cost as assured by the service center, and to resolve this issue at the earliest. The servicecenter told me not replce or rapier it liquid problem but i want to only remove my green line only