A post on this forum a year ago showed that clicking the ‘accept’ button in the email led to a page to create or sign in with a BT ID, looking like this
I’m trying to do the same, but clicking the ‘accept’ link now goes here:

The option to sign in with an existing BT ID is missing, it’s not further down, there’s nothing to scroll. Tried on Firefox, Edge and Safari, so it’s not a browser issue.
I tried to point this out in an online chat with BT but they just didn’t seem to understand.
Is there some way to report a website problem to them?
[Mod edit: Removed image that contained email address]
(Thanks mods for removing that image)
This is what the BT site now shows:
The ‘I already have a BT ID’ section that should be there is missing. Trying to create a new one with the same name shows this error, indicating that it *should* be there but isn’t: