My iphone 5 display screen is broken how do I turn my alarm off?

I tried to turn the phone off by holding the lock and home button but my lock button is broken too so it doesn't work 90% of the time. I honestly have no idea what to do to fix this but it's really pissing me off. I also let the alarm ring for like 10 minutes in hope that it would turn itself off but that didn't work either. I don't know what to do anymore.

Use Siri to do it. Hold your home button until you hear the beep and just say 'Turn of my alarm'. If done correctly Siri should say 'I have turned off your alarm for (time)'.

Hope this helps.

Siri, duh. Thank you. My alarm was driving me crazy!