You can turn down any procedure including cesareans if you're not comfortable with it and don't feel that there's a true indication for it.
WSS ^
If I'm not mistaken you actually have to sign something to have a section (unlike some of the other practices they just have to inform you) so don't worry hun they can't do anything without your consent. Once you get there and they see how control you are of your own body they'll respect that you know what you're talking about and back off (well hopefully, but those who go in, in control, come out in control)
That said, have you ever thought about giving birth at home? I remember starting my Hypno courses thinking they would be great so I can stay in control while I'm in hospital. No way did I want to do this at home, maybe after the first but not right now. Then as I became more and more in tune with my body I realized how most of my concerns were actually surrounded around the hospital. My hypno practitioner helped me to see how much MORE control I would have at home. And now I'm have a home birth. Crazy really when I think back to around 10weeks pregnant googling the benefits of an epidural.