Patek is an admired and distinguished brand. If I were PP I would immediately cut ties with the ADs involved. I would black list the sellers. No more warning, just action. It sends the message that Patek means it. A letter just means you would rather they not get caught and be an embarrassment.
If they loose a customer..so be it. There are plenty of customers out there. Just start firing lots of people involved. It would only strengthen the brand long term. I would respect the fact that they never call me back if I also saw them punish the flippers that they sold to instead of me.