Pls help, I got my CD stuck in the changer - I put it in and the machine said it was loading, but it seems it's slipped somewhere between the changers. I don't know if now the machine is ruined or if there's any way to retrieve it

I was thinking of changing out the unit, is it easily done? I know I'd need a DIN2 stereo in there in it's place.

Can anyone help me pls?