They mentioned it could take 1 billing cycle for the Preauthorized payment Agreement to take into affect.  https://www.koodomobile.com/en/help/setting-pre-authorized-payments

it can take one full bill cycle for your PAP to register. In order to avoid paying late fees, you can make your first payment through your bank or by credit card. If you pay your bill before the pre-authorized payment comes through to us, nothing will happen to your PAP and no double payment will be taken from your bank account.

I suggest you pay this bill by yourself. From the next bill, they will automatically take money from the bank account.