I did not get my latest electricity bill email.
I got an SMS telling me the bill was overdue.
I rang yesterday 25/2/22 and the lady I spoke to said she would resend the email.
That email has not arrived.
I have since received an email with the receipt for my payment.
I have also received two emails, just now, from the neighbourhood team.
I have been using this email address for many years and, yes, I have checked my junk folder.
I cannot pay my bill if I don't get it!
My recommendation is to give up!. Same thing happened to me. The only thing AGL could come up with was to blame my internet provider even though like you I received all the other emails they sent to me from the same address. Life is too short to keep trying to sort this out … now I just make a note in my diary to check the website for my bill.