Two different textures, one problem

I have two completely different textures in my head. The back is Type 4a, which I ABSOLUTELY LOVE and I feel as though I finally figured out how to manage it. The top of my head is the problem. I thinks its like a Type 2c or Type 3a, more of a wave than a curl. When I'm one day 2 of a twist out, the back of my hair looks great, while the top is starting to frizz out. Also, one of my biggest problem that I run into is having the top/middle half of my head being longer than the bottom half. It looks awkward. Is there anyway that I can make the top half of my head curlier to blend in with the rest? How can I keep the definition of the top half longer than 2 days?Thanks

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