I was talking to Fabian and selected "I can call social services to help you", and then nothing else happened; no more conversation, no new people, no option I could find to call said social services. I assume it was a bug that nothing else happened after that?
Characters can and will stop talking to you if a certain threshold is crossed. You never know when that happens, so you must be careful.
HOWEVER, the no new people part is definitely an error. Thanks for reporting it! And there's no social services button included, it's implied that you take that action when you choose it in text.
Still, thanks for playing the game!
Edit: The conversations appear after a random time, perhaps you just didn't wait enough!