The first thing the examiner should have done when you went to the briefing room after the ride, is sign your license.
Why didn't that happen?
A long shot would be to approach the CAA that certified him and ask them to enquire about the check ride, if you indeed passed the ride. If he confirms it vis a vis them, he might be "afraid of losing his job" in that direction, more than related to CAE.
Sounds like someone was misinformed, or was trying to pull a fast one, by renting the sim for a company OPC and then have the examiner sign off on a LPC without paying CAE for the full recurrent.......and got caught.