I would encourage you to provide a URL for the Google+ Page that you cannot access so that a Community Manager can look into it. It would also be helpful to provide the URL for the profile you log in through in order to access the Google+ Page.
Do you have more than one Google account that you log into? Are you sure you are using the correct account to try to access the Google+ Page?
It will be helpful for Google employees to know if you are trying to access it from the same account you are using to post in the forum?