I am Samuel and I can help. Is your phone still black?
I am going to have you try something:
Press and hold the On (power) button and the Home (circle) button at the same time for at 20 seconds, until the Apple logo appears.
Please try it multiple times.
Because if this does not work it gets much much more difficult.
That does not sound right because this is the solution to the issue. We can do a factory reset which will reset the phone completely.
Do you have itunes on a computer at home?