Back with my previous job, once I came out, though the whole push from them to use my "legal" name, ended up having a leading to having my last name out there. Which consisted to misgendering a lot. Co workers and others alike. Basically I would let it slide if they caught it in time and apologized right away and made attempt to correct themselves. There was a lot of resistance with a few, in which would happen daily and every single time, to the point to where I would have to plunge to their level, then yell at them, or slam office doors in their faces. After their departure with the company, they still did it so I have no part of them anymore.
I would always give friendly reminders of what their "accident was" if it happened again, I would be a bit firm, and pull them aside, warning them.
Anyways to make things short, I went through it all from the start. Ended up quitting last week, and feel a whole lot better for it.
Kate <3