So over the (almost) last two weeks I've called the local Microchip sales department and sent them an email, they would get back to me. I sent multiple emails to MicrochipDirect, they would get back to me.
The result: No mail, no call, nothing.
I noticed that none of the large distributors have any RN2483 chips in stock. Maybe they've been recalled or Microchip stopped selling them I don't know.
By now I'm really starting to worry whether I'll be able to deliver the applications that have been sold. And I'm very disappointed by Microchip's inactivity and non-communication.