When you say "canceled" do you mean suspended by Airbnb for some violation or do you mean you took some action and deactivated your listing?
If it's the later, on the link below you will see how to reactivate your listing unless you took the permanent action of "deactivating" your listing in which case you will have to start over.
I just thought I'd check in and see if you had any more information about the cancellation circumstances that might help us give you the best answer for your question!