How to recover data from locked iPhone 15 with unrecognized passcode?

I bought my iPhone 15 128gb on 30.4.25. It's even under warranty. Suddenly, from yesterday, I've been trying to enter the same passcode to unlock which I've been using for months now. It said it was incorrect and, after 8 attempts, it locked me out saying the iPhone was unavailable. I do not have the back-up of any files or data inside the iPhone. I turned off icloud saving. I tried contacting support. All of them are saying that it's impossible to happen. You have to reset your iPhone, which will cause you to lose your data permanently. I need help with this. I need my data inside the phone. Please help me out.

I didn't change my passcode. Only I know the pass. Nobody else has ever used my phone, so please, it's not my fault. I never changed my passcode. All of this happened on its own. It's not my fault. Please help me out with getting my data.

[Re-Titled by Moderator]

Original Title: Passcode not recognizing