Random numbers calling me?

So ever since I upgraded my phone to a iPhone 7 with my mom and aunt about 3ish months ago, i've been getting calls from random people here and there. But in the past month now I've been receiving one phone call every. Single. Day by different numbers at the same time of day. Around 9:50 am. It creeps me out just thinking about it honestly. Why are these people calling me at the EXACT SAME time of day? Everyday? And why different numbers every time? It's annoying because when I try to sleep it wakes me up each time, I go to answer, and it's either an automated voice of some random company or nobody talks at all. I haven't changed my number for the last year or so, so I know that can't be it. I don't know how many numbers I've blocked now from this but I really want it to stop.

My iPhone 7 won't turn on?

So last night my phone was fun. Then I woke up and my phone wouldn't turn on. At first, the screen was just black, but I could press the button. Then I tried to restart it but the apple logo would just pop up for a few secs before fading to black and now I can't click the button. WHAT DO I DO? And how much would it cost to fix this problem at a tech store?

My flashlight on my iphone isn't working?

I'm pressing the button in the command center and its available to be pressed but when i press it, it cuts right back off. The flash never comes on but the button can be pressed but doesn't stay on.

IPhone is NOT blacklisted, but can't be activated?

I recently bought an iPhone and I'm having trouble activating it. The IMEI isn't blacklisted, but I can't get any service on the phone. I believe the phone was under contract and the previous owner neglected to pay their bill. Is there anything I can do? The phone is Verizon, if that makes a difference.