Top ts terrible products

I've always received amazing service but in February I bought a new toilet for my parents and they only opened it today, to my surprise it didn't have the wholr flushing machenism inside, when calling I was told it was check and they can't do anything... How wasvI supposed to know that was not their as a customer when you buy an item u expect it to be of proper quality especially because toilets aren't my field of expectees