Integration with CF7

Hi there,

I would like to use this plugin with Contact Form 7, with Conditional Fields.

Basically, I want to collect survey data before they “enter’ the competition. Where this plugin will come in is to simply check the validity of the inputted code. It would be nice, but am sure it will require development, if once the code was verified I could display the rest of the form. Then, once the customer fills it out and hits submit, it will submit the code with the form data.

You can see in the link here what I am trying to achieve.
https://www.growthmedia.co.nz/egg-hunt/

Let me know if you need more information and whether this is possible.
Thank you

The page I need help with: [log in to see the link]