Why is it when you call for the cops they take an entire century to show up?

Last year I was almost attacked. I called the police from my cell phone while the attacker was still there taunting me, I begged and pleaded for the police to hurry come. The Police took an hour and fifteen min to show up. They told us no units were in the area at the time.
I am sure if they got a call about a dead body being found, about 20-30 units would show up in less than 5 min. so why is it I am a living person in a life or death situation and they don't show up in sufficient time?