S21+ Faulty Screen

My S21+ screen just went off (blank). Everything still working just the screen wont show anything. I took my phone to Samsung Kolonade which the booked my phone in for repairs. Now the plot twist is when the repair department sent me an email with a quotation (R4100) saying my device had a cracked screen.

My device didn't even had a scratch when I took it to the store. Both me and the Lady who was booking the phone can attest that the phone did not have a crack when it was booked in. I feel like the repair department doesn't want to take accountability that most of these Samsung phones have this Faulty screen problem. So now since they sent me a picture of the crack which is like 25mm wide on my screen. Tell me how can one miss that when the phone was booked in.

Who cracked my phone that's my question because it makes my warranty void? I need answers (something is fishy)