You are the second to ask this question recently.
When will the site be updated....probably never, or at least not in the timescale you probably require.
The bills will be on the legacy system and finding someone who will be able to access that in Customer Services will be a problem.
Ask on Social media. The team there is UK based and more clued up
Links in the Help Guide
Guide: How to find help & contact O2
This is not O2 and we are all customers here similar to yourself and cannot answer account type queries.
