I appreciate your message.
If it was that simple I think I would have found it already.
I tried that, but when I click on my account, I get the following screen.
It mentions Ambassador, but only show until when I have the Diamond Elite status.
Similar story in the Android app. Under my name the words "Ambassador" are written, but I can't find a date.
I have the same issue as well, I see when my Diamond expires but it just says 'Ambassador' like you with no date