Last time I checked, they charge a nominal fee, something like $50. The lawyer will give you something like half an hour to explain your situation. And he will offer his professional opinion. Based on what he says, you may decide to proceed with the case and use his services. At that point, you are back on the clock and it can get expensive. He may suggest that he write a letter to your employer and if you are lucky, that will get the ball rolling without him putting in too much time.Definitely need to talk with a legal professional on this matter. The previous link for the Law Society of Upper Canada should be your first stop. I do believe there is a pro-bono (free) service you can access, but don't know its effectiveness.
And while I don't have much knowledge of labour law, I would say you might be entitled to a few weeks of severance plus your lost wages while suspended. You might also ask the lawyer if you have any chance of recovering your legal costs in the settlement. As others have pointed out, there is also the matter of your reputation to clear up.
Good luck.