I had the dial of my grandfather’s Nivada Antarctic, that my father also wore until he passed away, totally screwed up during a service. The watchmaker, who is a nice chap, but to be honest also a bit of a klutz, spilled some acid or something on it that could not be removed, and at first would not admit it was him (or he did not remeber doing it). I ended up taking it to another watchmaker and have the dial totally refinished.
I got over it. I was quite frustrated, when it happended, but have since moved on. You should do the same. Shit happens. Your son will appreciate the watch regardless. The demand for a new watch from Omega so your son can start a collection of his own seems totally disproportionate and a bit disingenuous to be honest.