Or a server issue. Seem to recall Leon 4 owners having an issue where it was in the server area. Any chance of them issuing you a new user so you can start again. Probably a procedure they have to go thru to remove the car from your account so you can start off again.
Seat central technical support the dealers go thru should be the guys that are giving them the details of what to do. Depends how much the dealers staff are doing off their own back.
Certainly not be able to login as primary user has come up wity Leon 4 users.