iPhone 11 Screen Popping Out/Loose Screen

Hey Guys,

I just bought a used iPhone 11 with limited warranty and No apple care. I chose one with warranty thinking that i would not be in any sort of trouble in the future. But sadly, my bad luck I guess, my screen is popping from the bottom. The old owner had replaced the display and it’s not from the Official Apple Store but the phone is still in Apple Warranty. Will I be able to show my device to authorised service center cause I’m really worried and can anyone explain what exactly is causing the screen to pop out? I feel like I’ve been cheated. 😭😭😭