I'm assuming that you didnt have preauthorized payments? It should have been credited to the method of payment within days. Otherwise you get a cheque mailed to your posted address. This can take 30-60 days. There is more info here:

https://www.koodomobile.com/en/help/things-know-about-cancelling-koodo

I'd give it a couple weeks to go to 60 days and if you still don't get anything, we can flag a rep np