First, may I call your attention to the guidelines for using the comments feature found here:
https://www.askmehelpdesk.com/feedba...ure-24951.html
While I agree that reporting the landlord was bad advice it was opinon not fact. Therefore it did not warrant a negative rating. As for AK's advice, you did not say you spoke directly to the Postmaster, you simply stated the "P.O. people". I was going to make the same suggestion. So your rating there was also inappropriate.
My suggestion is similar to Wondergirl's. Add something to your address. For example 101A Elm St where your landlord is 101. But this needs to be worked out with the Postmaster specifically.