Jailbroken iphone won't start? - 1

Ok, i know i deserve scolding about how i shouldnt have jailbroken my iphone, how i'm responsible, yada yada yada. But, i'm just looking for help right now, my phone was jailbroken, and has been for several months with no problem, but today i installed an app through cydia, and the app crashed every time i tried to open it, so i of course went back to cydia to delete it, but i guess that didn't work the way it was supposed to, and now my phone is broke. While trying to uninstall the app, my phone froze, so i turned it off. But now it won't turn back on, it goes to the white apple logo screen for a few seconds and then turns back off. I have tried holding the volume button, etc. But that hasn't worked. Itunes won't recognize my phone, and i can't do anything with it because it won't turn on… Is there any way to fix this? Who can I take it to? Will apple at least get it to turn back on, i mean they can't tell its jailbroken by looking at it? Ill do whatever it takes to reset it or whatever, but i don't know how. Its a 5s by the way

Set the phone to DFU mode and reset it completely with iTunes.

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