High oil level

I assume you followed what ever the owners manual said on how to check the oil; engine hot, engine cold, check when engine is idling and warm etc. If you followed the instructions and it is still high I would change the oil and measure what you get out and then replace with new oil and check it again as per instructions in your manual. It is not good to run a dry sump with too much oil, usually the PCV system is plumbed into the oil tank and you suck oil into the engine’s intake system and that is not good.
I would do this myself and not have the dealer do it that way you will sure of the above results.
And shame on you for defecting to GM guys haha

 

What's the status of the car? An absolutely new car that you took new delivery at 0 miles, or a used car that you bought after someone else had an opportunity to do things wrong?

I like Vern's suggestion to drain and compare the amount removed to the specified amount (with some fudge factors for oil filter, lines, not really possible to get it all out, etc.) as a sanity check (and a coolant check).

 

Most Ferrari owner manuals recommend checking the oil level with a warm engine at idle. Is this the procedure you followed? If so and the level is an above the maximum line, I recommend removing some oil to get below the maximum line.

 

C7 or 8?

 

Yes, new delivery should minimize errors unless, during a pre-delivery check, an inexperienced tech did it wrong and thought that he/she needed to add several quarts. What are the Owner's Manual checking instructions?