Ugh. OP, kill yourself. But if you have a strong will to live, listen closely.
Stop praying for relief from urges. Stop fasting for relief from urges. You can pray for the strength to resist temptation and it will work for a time, but praying to resist temptation naturally acknowledges and reinforces the temptation.
To get rid of pedophilic urges for real, you have to detach from them. You can transfer the urges onto other subjects so that your mind sublimates or subverts the hooks on which the thought has hung. You can teach yourself to grey rock your own desires and respond to them blandly. You can blast them out of your mind with memetic antidotes if you know the trick of forming a ones' complement to a thoughtform. Very important is that unlike praying and fasting, none of these things acknowledge the basic power of the thought you're trying to get rid of. You aren't calling it a temptation by displacing, dulling, or destroying a meme in your mind. You are calling it inferior and unworthy of your own best self.
Calling a meme inferior is what you want for getting rid of it. Cultivate in yourself the awareness that you are greater than pedophilia.