I resigned from a job about a month ago, it was a 12 month fixed term contract and I did 6 months. I left due to the toxic atmosphere, and constant pressure to do extra hours despite having agreed part time hours as a reasonable adjustment for my long term health condition. After I left I was sent an exit questionnaire to complete and I gave honest feedback about how I was treated. I've had an email from the head of department today, asking me to meet her to discuss it. I'm not sure why, I've left and haven't raised a formal grievance. What reason could there be, and should I agree to meet her in my own time when I've already left and want to put the whole sorry episode behind me?