Neither BT nor the ombudsman have been much help - BT told me it could be as long as 6 months and closed the call.
It's not only the issue of billing being in this area (which has been remedied by them sending out paper bills) but also parental controls/blocked websites etc. Simply got told by the ombudsman I'd need to call Bt every time I wanted to add or remove a website/amend parental controls.
I think if we are unhappy we should at least be given the option to leave BT with no penalties.
Your problem is that the majority of us have no issue logging into MyBT either in a browser or using the app. Probably the most common problems are using the wrong BTiD account, or no longer having access to the phone number used for 2 factor authentication.
If you could explain what exactly what happens when you try to log in, it could be useful!