Hello, I really want to help you with this.
I work in a big retail company and I have done many web crawlers for extracting data from web pages, projects like extract a complete list of products or even fill complex forms, downloading result files and processing them in a more complex analisys.
Please be confident that you will get the best work.
About how to do it, there are many c# tools that helps to do this job and if you need something that the tools dont do, I know very well the standar interfaces to comunicate with explorers and extract the data or interact with any form.
We wil be in close comunication and I will share a detailed tasks progress and dashboards of the project so you will see in a very nice site how is our project going.
Thank you.