iPhone 16 Pro Unstability

So I got my iPhone 16 Pro the very end of October and have had so many issues. I have spent HOURS chatting with apple support and have gotten no solutions. The first big issue was after downloading IOS 18.1 my text messages would delete themselves off my phone on their own and wouldn’t even be in recently deleted. I did everything to try to fix it that support said and nothing worked.

My phone unfortunately got worse however when in the course of a week it crashed twice. I took it to the Apple Store and they said the analytics said it’s unstable so I would need to bring it in for a repair. They ordered a part for my phone and I took it back to get the repair today. I dropped it off with them and trusted it’d be fine. However when I went to pick up my phone they told me that it’s fully charged and on but the display isn’t working.

i had no display issues previously so something happened during the repair.

as I’ve said, my phone is brand new, and when I first took it in, they said they saw no signs of physical damage so clearly it was an issue with the way it was manufactured. My frustration is I don’t understand why they can’t just give me a new phone when my phone is new and there are so many issues with my phone. I left the Apple store with a loaner phone while to my understanding they’re ordering a new phone that they’re going to use the new phones parts to replace parts of my phone or something like that. I’m honestly not sure what they’re doing but I don’t think I’m just getting a new phone. I think somethings happening. But my frustration goes even deeper in that I was told to go ahead and back up my phone to the iCloud Before I brought it in today, and I have literally tried all week to get the entire thing to back up and it would only partially back up and then it would drop. I couldn’t even get my Photos to back up to my iCloud. I’ve had the most stressful week and a half dealing with customer service and I feel like everything is just getting worse and I don’t have a real solution for my phone. I’m so frustrated that I had to buy a new phone because my old phone was starting to slow down And right now I don’t even have a phone really.

I’m just wondering if anyone else has experienced this and what I can do because it doesn’t seem right that I bought a brand new phone and a month later it’s completely broken, especially since it got worse after being repaired by Apple.