HELP!my phone completely broken won't power off &alarmclock wont stop

My phone got smashed so I have a cracked screen and all the buttons are messed up. I try the power button it won't shut off i try power button and + or - volume key and that won't work...so my phone is stuck on and to make it worse my alarm clock keeps going off and I can't make it stop going off cause the buttons don't work and my screen is completely black.if it wasn't for the alarmclock and led lights blinking you wouldn't even realize its on..I'm about to go crazy please help I just need to power this dang thing off