hi Sarah, If you phone was from Koodo, you can send message to their facebook with your phone IMEI number, they will reply with an unlock code. You could also call (1 (866) 995-6636), but expect a long wait on the phone.
Calling them doesn't necessarily mean a long wait on the phone. Sure you could wait on hold for a bit or you might get through right away. You could message them on Facebook or Twitter and it might be days before they answer if at all as has happened in the past. You might luck out and they respond right away. Use both methods.