It is indeed Energica fault and bad communication with the customer. The ex-dealer was able to show me documentation proving that. Sorry, I can't say more details. But more thumbs down to the main Energica office.
To me it is pretty obvious what has happened there and I have strong doubts it's actually Energicas fault. The CoC is the essential document for a bike, because it effectively proves the ownership and is needed to actually use and register the bike. The CoC will be issued/sent to the dealer as soon as the bike is fully paid. So if the dealer hasn't received the CoC within 7 months, he hasn't paid the bike - it's as simple as that. This is what most likely happened:
-Dealer got approved by Energica and ordered a Demo Bike. He made a small down payment and chose 180 days payment for the rest
-Dealer decided not to pay the bike when the 180 days were due (for whatever reason)
-Dealer decided to sell the bike to you without actually having the necessary documents and knowing it will be useless for you
-Dealer is trying to hide his fraud by telling you stories and trying to make Energica look as the bad guys
What you should do immediately, is to return the bike to your dealer and get your money back. Otherwise ask your dealer if he's able to prove the full payment of the bike - if he's not willing or able to do that, things are obvious.