If what you say is accurate.
Everything should be/have been covered under warranty.
If it is Fadal not covering the stuff, they will go out of business quickly.
It is more than likely faults of your dealer. They are certified factory repair? (should be if they sell new). If they screw up an install it is THEIR fault.
Have you talked directly to FADAL?
They need to save face on this matter somehow.
are the spindles Fadal certified? or just done be a local rebuild shop?