They probably won't listen or pretend to. Maybe they will.
You aren't "saving" the pig because there will be ten more bred to take his/her place b/c they are selling and making money off of them.
It isn't an adoption either. It's a sale from a pet store that gets it's pig from breeders. You are supporting this by giving your money to the pet store.
Adopting is going to an animal shelter or humane society or a rescue.