Two weeks ago I bought a iron hair and I tried it to dress a hairstyle like in the 20s. The thing is that when I try to dress my hair like in my own style, my curlies went away! I only have curly on the bottom of my hair, but the top of it is completely straigh!!! I don't know what happened. My kind of curl was 3a.

How can I get back my curls??? I would be able to get them back?
I'm quite sad

thanks a lot