My iPhone 4s Froze when opening cydia?

I was opening cydia (i've been using it for over half a year and had no issues) and it froze.
I thought it was lag like usual but my entire device froze, i can't even close it, its just loading in grey letters in the middle of the screen with a loading wheel.
I held down the home and power button for periods of time to try and fix it but eventually, the screen turned black with a loading wheel on it so it's still on.
Is there any way i can force my iphone to close or something?

Hold the volume button and power at the same time for about 8 seconds. It will shut off completely. Works all the time

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