Facebook Group Downloader

Hello, Can you make a script to download complete Facebook Group ? Basically, I want to download all text content from groups , not images and videos only text and If we use Facebook API , than I guess we don't be able to download from Closed or secret groups so, I have a Facebook ID where I have joined many Facebook Closed and Secret groups now I just want a simple script to download complete group from post 1 to today's post Now If we use Imacros / C# / Javascript , what solution you have and how it will work ? for making it stable and reliable as on Facebook Group Posts , we also need to click on see more to see complete post as sometimes due to internet speed or facebook issue , script could be stopped or not working Hope you have a solution Budget - $10 - $20 Thanks