I set up an authorized Chequing for the first time yesterday, and my home internet is bill is today. But I changed my mind and I want to pay it manually now, so will I be charged twice since there's not enough time since I cancels my PAC?
You can cancel/change your payment method any time through your fido.ca account. If you were already charged though, we won't be able to reverse the payment. You can still opt-out of pre-authorized payment and make manual payments going forward.