Hi Bishar1987!
Welcome to AGL Community!
If you are trying to open the bill from the App or My Account within the first few hours that it is uploaded, it may open the old one as the upload gets completed.
If you are trying to open it from an email that you have received and you are still facing difficulty, I recommend you connect with our team through the AGL App so that we can investigate this for you.
Thank you
Ellen