How do I get the turn signal cancelar plastic piece out of steering column

Do you have a FSM? I'd always start there for questions like this. If you don't have a FSM then you kind of have to just poke around at it. They put those things together in different ways. Sometimes the cam will come out but a lot of times it is connected to the wiring and the whole harness has to come out. Do a google search for a replacement part and see what it looks like.