Webscrapping expert needed

We have developed a python script to scrape FB posts, comments, replies, etc from our PRIVATE GROUP. But the same is not scrapping the details properly due to some changes at FB side.

The requirement is to fix the script to scrape all the information that we need without any issues. Also we have tried this with multiple developers, but not getting a permanent solution. So now we are looking for a permanent solution, please bid only if you are an expert. Better if you are an expert FB graph API developer.