Still yellowish ting after screen replacement

Hello everyone!

Today, I got my XS phone back from iStyle, because it had a very noticable yellowish tint, and they replaced the screen with a new one in four days. Problem is, it looks totally the same like the previous one, still very different from all the XS in the stores. I went to 3 stores to check their iPhone XS screens, and they're all better, "whiter" than mine. I can't stand it, and I don't know what to do. in the store they said they cannot change the screen again. Could it be some kind of sensor, or hardware problem? Because it is EXACTLY the same like before. I would really like if they replaced the whole phone to a new one, because the screen replacement did not work... What to do in this case?