NAL
Blocking on social media is a free speech issue, because it prevents you from broadcasting certain types of things in reference to that elected official, so they can't do that
Telling you you can't call them is way different. IDK how much legal weight they may have but it may be quite a bit. Also calling them once they've said they will take legal action is unlikely to influence them to solve the safety issue that is the the original issue.
I would contact the news or a lawyer; it sounds unlikely that following up further with the elected official is a good idea. To me. NAL