Form Plugin suggestions

I am using Contact Form 7 plugin for creating forms for one of my clients PayCanada. You can check the example that I am using currently from PayCanada Online Application.

However, I am not satisfied with its features. I need a form plugin which stores and tracks form submissions. Also, need something which allow me to export form submissions like an excel sheet.

Is there any form plugin with these features that anyone can suggest?

Thanks for the help!

Ercan