Can a kik messenger user hack my iphone camera?

I was on my new iphone on kik messenger recently, and some random girl popped up, sent me a picture, and asked me to send a live one which is where you take the picture on the spot rather than pick one from the iphones gallery. After some hesitation i just sent one. The person then sent a message back saying they were going to hack my iphone camera. Was clearly someone pretending to be this hot chick.
I have reset my kik messenger account as i don't have much use for it anyway. Done a factory reset on my phone, and reset the password on my apple id.
I'm still paranoid as hell that some weirdo could be looking at me through my from camera on the phone… Might be a stupid question but is that even possible?

Don't worry, the creep was just trying to scare you for fun. There's no possible way he could do that UNLESS you told him your iPhones ip Address (which isn't possible to find by hacking)