I am having the exact same issue.
I am new customer, actually a returning one.
I want to check my E Billing but I cannot create an account because, no matter what password I choose it's not accepted.
I am still waiting for my line to be activated/service installed.
Thank you for taking the time to post on the forum in regards to your account, bills and setting up the online account. We understand the confusion this can cause and you taking the time to raise this via the forums.
We can see you have spoken to the team since posting and discussed this, were they able to help resolve your query and answer your questions? Pleas e let us know.