Originally Posted by NickB

IIRC, the *A contact office is located in Germany, so you can look at that as legitimation for indulging in Germanic cliches . That said, I very much doubt that the *A office has the resources to investigate those kinds of complaints. The whole "*A" infrastructure must be no more than a handful of persons and their main activities are not at the customer interface end. Ultimately, it is really the airlines themselves. My guess is that you are more likely to get results from contacting the airline whose lounge refused you entry (in all likelihood, it will have very limited impact but still a little more than other avenues).