How To Make Curly Hair Straight Without Using A Straighter?

I probably have the utmost unruly curly hair ever. It's natural. I have ringlets. But the underside of my hair is more straight then on top,(I know because it's weighed down.). But my curly hair sprang up on me about 3 years ago. I NEVER wanted the hair I have now. And many of my friends and family tell me that not a lot of people have naturally curly hair like I do. I know that. But my MAIN question is; Is there ways to make or train my hair to be straight again? My hair is SO damaged because I brush it a lot after I shower, use gel constantly to help it from "frizzing", and died it twice recently(with in 4 months). I feel like I am SO out of options of trying to control my mangled mess. Please help! It would be VERY appreciated! :D