I’d say the response received was due to the way you spoke to them in the first place.
Straight on the attack.
Did the bearings fail due to machining tolerances on the hub?
Did the bearings fail due to enthusiastic jet washing?
Did the bearings fail due to side loading? Are you a lazy whip master?
The grievance of novatec being specced is down to you, you knew what the spec was when you bought it, same as if you bought a ferrari with linglongs all round.
I would put your feelings aside and look at it pragmatically.
Do you want to send the wheels to Novatec for inspection?