IMO, the radio station was not the place to throw a wobbly, I'd have just said "actually, I'm known as the Chair" - but that in itself is stupid. I chair a local voluntary committee and I've made it known that I am the Chairman, female or not. Our local mayors have been women for the last two administrations, and they are always called Mr Mayor. It's the post which carries the title, irrespective of male or female. No point in making a point, and making yourself look stupid in the process.