17 Pro Max touchscreen not working!!!

I just recently switched over from Samsung to an iPhone 17 Pro Max... I haven't even had it for a week, and my touchscreen is completely unresponsive. I've tried restarting my phone countless times, and it only worked once for a couple of seconds. I was wondering if anyone else had the same issue, and if you have, maybe found a way to resolve it??? I have an appointment at the Apple store later today, but I have a suspicion it is not going to go well.