Hens haven't laid since I got them in sept
You are not alone it seems.
There are two main reasons for a hen over 1 year old to stop laying in the fall. The first is seasonal molting. While molting all their energy is focused on growing in new feathers. Some hens will resume laying once they finish molting, others won't resume until days start getting longer and springtime is on the way.
The second reason is that the days are too short in the fall/winter. They don't get enough light to maintain production.
The good news is that the days will begin getting longer again in just a few more weeks.