sorry but I am not sure what your problem is so can you give a bit explanation
I can sign in to mybt but my email is different login
I sign into myBT using my id etc. Goes straight to my emails. Id etc set up some time back and has worked up until now. Don't know how else to explain this.
OK. I go to MyBt to view my bill. Click on View my bill. Takes me to Login page. Enter ID and Password. Hit Login. Highlight MyBt. Select View my bill. Takes me back to Login screen and the process carries on and on and on. round in a circle.
That clear enough?