I fell off my bike and I rolled down a really steep hill, what should I do I broke my leg?

Luckily I brought my iphone, also I'm really high so I can't call the cops or an ambulance.

You don't want to be walking on a fractured leg, so if you can't get help from someone you know who can drive you to an emergency room, then you're going to have to get an ambulance. Don't worry about anything else right now other than your injury; that has to be your first priority at the moment.