When I try to get emails on my Mac Air I receive the message 'we are experiencing issues with this service. please try later'. I can receive emails on my iPad and iPhone. This has not changed over two days despite repeated attempts to 'try later'
This is just a customer to customer help forum, everyone here, including myself, are just customers and will not be able to deal with any issues relating to your account.
I'd recommend calling or messaging the technical support team on this link Fix email | BT Help