Actually I have now received the previous bills requested. The email from AGL was date stamped 2:11 on Saturday but I did not receive it until sometime Sunday morning so it's not possible to say whether it's your fault or Telstra's.
Our previous address as at July 23 was Eleanor Street Ashburton 3147. I paid a bill for Eleanor Street (gas) of $520.40
I need to see the details for this bill as it seems very large.
Your website does not provide easy access to this information