Since you had an issue in the past, you should have confirmed at check in that your wanted complete privacy, no acknowledgment to anyone that you were at the hotel. You could have even shown your 15 month old email from the manager to confirm it would be followed. You need to be your own best advocate. I am in no way saying the hotel was correct, but since it is an important issue to you, your should have confirmed at check-in. Just my opinion. (I ask a lot of questions, so the hotel knows my expectations, and I understand theirs). Sorry this happened to you.