warning lights/alarm/car won't start

I had my oil changed but they were unable to reset the oil indicator warning light. The next day when I went to power on my vehicle, the entire display lit up and an alarm sounded. When I walked through the various reset procedures the oil warning light stayed on along with an alarm..I let the car overnight and when I went out in the morning, the alarm turned off and the oil warning light went out. The car is now completely dead and will not power on.