Hyundai Motor India — Part miss concern after insurance identified by another service centre

Dear sir/mam,

I had got my car repaired from Hyundai showroom (district-Jhajjar, State-Haryana, 124103) in February 21.
Again my car got hit & I given for repair in Aug 21, service PIC(Bhiwadi, district Alwar, Rajasthan) told me that one engine part is not available.
I am surprised to hear about it & shocked.
I want a proper investigation about it, as this related to mine safety. I any misshappening would have taken place.
Who should be responsible?
Regards
Sachin
Car no- HR14L7107
Contact no-[protected]