Make them afraid. It works very well. Here's an example:

https://www.dailymail.co.uk/news/article-9035645/Idaho-health-official-leaves-meeting-anti-mask-protesters-surround-home.html

You have to be willing to fight. Power-hungry politicians and bureaucrats don't care about your emails and letters. They do care about their own safety.

This is what it's come to.