It's impossible to put it on DFU mode because the thing won't turn off and I don't know what to do and it's getting me crazy, please someone help me! iTunes won't recognize it either.
Try this first:
1.Press and hold the Power button and make sure that your iPhone is off completely.
2.Press and hold the Power button and the Home button at the same time.
3.Keep these two buttons simultaneously pushed for 10 seconds.
4.After 10 seconds, release the Power button. Continue holding the Home button.
5.Continue holding the Home button for 10 more seconds.
This is for resetting your iPhone.
If it doesn't work, then try another method: FonePaw iPhone Data Recovery.
1. run iPhone Data Recovery, connect device to PC.
2.click restart, then your iPhone will be normal again.