Alarm still ringing even it is turned off and deleted

1. Do you have any third party Alarm App installed which is interfering with the default Alarm app?
2. Do you have BedTime alarm set?
3. Was there any Alarm symbol on status bar on top (Watch the 1st GIF below)
4. Check your Reminders Today Notifications (Watch the 2nd GIF Below)

Um wait until its battery drained

I am also having the same problem and have done all of the suggestions. What now?

wanna break ur microphone so it doesn't make no more sounds? throw it in pee and drown.

Same here 😕

Mine is doing the same thing at 7 am . I work till 3 am and have to wake to this stupid glitch !