I have the same issue. I cannot access/manage my mobile bills through the app or the website. I can manage broadband fine. The issue has been going on since at least November (that is when I noticed it) and I have had to get my bills sent hardcopy in the post. This is no way to manage a mobile phone account.
I have spoken to EE on several occasions, only to be told 'it's a known issue, affecting some customers. We have sent the issue to operations for resolution. We can't tell you when it is resolved, just keep trying the website.
The message I get is 'Application Error: Client side error. See browser information', which is meaningless to me.
I have asked EE technical support to escalate and was simply told 'My manager says the same thing as I said. You just have to wait'.
Does anyone have any ideas on how to escalate this and get it resolved?
