I was surprised to receive a reply telling me to check my account settings. I have been billed monthly for decades. A simple "you will receive your bill in a few days." would have been the the appropriate reply. A reply like the one sent to me implied the people at AGL were not interested in looking at my inquiry or explaining why my bill was late. I have since changed my account to bill smoothing and will no longer expect a bill in the email so I can pay promptly.