Re-activation of my original navigation system

[troth45]

Good morning everyone!

I ask for your kind help to understand how to solve a problem with my navigator on a 2-series Gran Tourer F46.
The map version is EUROPE ROUTE 2016-1
Yesterday I wanted to try to update it without going to BMW (where they asked me for €120).....in hindsight, it was better to accept!!!

Basically I downloaded the EUROPE WEST 2023-1 maps onto a flash drive
I inserted the key, the car recognized the update, asked me to enter the activation code and therefore I aborted the operation because I didn't have the FSC code available.

From now on the car no longer allows me to access the navigator; whether the update stick is plugged in or not, it asks me to enter the activation code!
I then contacted an FSC code supplier who, very kindly, after paying and providing the VIN, sent me both the FSC code of the original map (the one from 2016) and the new map (the one from 2023-1). Unfortunately neither of them work.

The seller now advises me to buy the ENET cable so as to connect remotely to identify what happened.

What do you recommend me to do?
Is there a way to restore everything as originally or at least to restart the navigator with the old map?

A big thank for your help