How can I fix my Defy Automail 600??

I recently moved house, and my defy automaid 600 appears to have gotten damaged. Everything appears fully functional but the selector knob is stuck and won't turn. I put my laundry in, but couldn't turn the knob. It was pretty much where I needed it, so I turned the machine on, the water filled, and the cycle started, but didn't proceed to rinse and spin.