You could try another locksmith. If they're not familiar with the QX30 ask them about a Mercedes GLA (It's the same keyless GO system, afaik).
Otherwise, an Infiniti dealer should have no problem programming the FOBs.
2018 Infiniti QX30 Premium AWD - Majestic White
2019 Volvo XC60 T6 AWD Inscription - Onyx Black Metallic
2009 Kawasaki Concours 14 ABS - Candy Diamond Red
1986 Honda CB700SC Nighthawk S - Candy Aleutian Blue and Shasta White