lol.... don't give up.
I know exactly how you feel. I went through this when I bought my 4 chickens in September, and they were supposed to be at point of lay.
I waited and waited, and talked and talked and treated them every day.
Finally it was the 20th of November before I got one egg. Now I have 2 laying regularly, and another about to start I think.
I have become such good friends with my girls that the one flies at me every time I open the door to the run and sits on my knee, and I cared so much about them I was really afraid when they started to lay. Just in case they had any problems.
I thought maybe I would have to wait for longer days after Christmas or something but they are doing fine already at the coldest time here,so it shows there is no strict rule here. they will start when they are ready.
good luck to you.
Jena.