No I've asked different question, that is not the answer to this question. directing me a third party is not the correct answer. Maybe I should why this has never been implemented over the years is this a policy issue?  There is not technical issues to why its never been done. But you don't have the answer and could have said you don't know.

Your directing me to use another website? I'm sure the 'team' love that. Thanks

What really? why does it only half work? I should be able to block bad sellers 

So if the person doesn't have the app, the option to send the message to that person will still be there? So it's a hit and miss if they get it?  I had a quick look and I couldn't find any refence for messages in the API 

The "Next steps" at the top left of the closed listing page (underneath the total), that has the link feedback isn't there. The page just hasn't generated properly after the auction ended. Its a "feature" that might need a patch

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