Agreed.
Rams are not a fish for beginners, and not a fish you should just 'plop' from one environment to another.
The best any of us can do is be fair minded in such cases, and the fact you are even questioning your liability in this situation shows you are.
I have done the same as Smidey in as much as replacing fry/juvies if they have perished quickly after sale, but that was because I had extra fry to give, and believe in the benefit of doubt.
On the other hand. I have had the situation where fish already paid for have arrived to me by courier in over crowded leaky bags,males in with females, 1/2 the fish almost dead, the other 1/2 barely moving, and was told in time by seller that I had clearly done something wrong in acclimatizing them so no refund or replacement fish.
Funny how quickly the focus of fish who would be pets invariably turn into "Lost money" when dead- to seller or buyer
You never can tell I guess.
I think LA's advice is a prudent approach.