Welcome to the Community and thanks for posting!
I'm sorry for the problems you're having accessing your mailbox. This is something that we will need to check out from here so I have sent you a private message with instructions on how you can send us over your details and we'll look into this for you. See: Private messages
You must reply via private message. I have moved your last message out of public view, as it contained personal information.
This is the link https://community.bt.com/t5/notes/privatenotespage