you cannot call the lounge directly. The best is indeed to do what you have already done.
I have had a very good experience with this service, without doing anything a couple of years ago.
I was travelling to the US for visiting friends for a couple of days. And I was already there for 3 days when I received an e-mail from this service saying that they have found my bank checkbook on-board flight AFXXX in an overhead compartment. I turned "white" reading this and went immediately to my bedroom to look into my jacket I didn't touch since I arrived, and indeed there was no checkbook in my pocket. What happened is that it fell from my jacket pocket in the overhead compartment and I did not notice it when disembarking. So the crew found it after we disembarked and it was returned to CDG at the lost & found office where it was waiting for me when I returned ^
